diff --git a/src/designspace.rs b/src/designspace.rs
index bf312103..eef673d8 100644
--- a/src/designspace.rs
+++ b/src/designspace.rs
@@ -26,6 +26,14 @@ pub struct DesignSpaceDocument {
     /// One or more rules.
     #[serde(default, skip_serializing_if = "Rules::is_empty")]
     pub rules: Rules,
+    /// Zero or more variable fonts.
+    #[serde(
+        rename = "variable-fonts",
+        with = "serde_impls::variable_fonts",
+        default,
+        skip_serializing_if = "Vec::is_empty"
+    )]
+    pub variable_fonts: Vec<VariableFont>,
     /// One or more sources.
     #[serde(with = "serde_impls::sources", skip_serializing_if = "Vec::is_empty")]
     pub sources: Vec<Source>,
@@ -67,6 +75,52 @@ pub struct Axis {
     /// Mapping between user space coordinates and design space coordinates.
     #[serde(skip_serializing_if = "Option::is_none")]
     pub map: Option<Vec<AxisMapping>>,
+    /// ...
+    #[serde(rename = "labelname", default, skip_serializing_if = "Vec::is_empty")]
+    pub label_names: Vec<LabelName>,
+    /// ...
+    #[serde(with = "serde_impls::labels", default, skip_serializing_if = "Vec::is_empty")]
+    pub labels: Vec<Label>,
+}
+
+/// Maps an xml:lang language tag to a localised name.
+#[derive(Clone, Debug, Default, PartialEq, Serialize, Deserialize)]
+pub struct LabelName {
+    /// Language tag.
+    #[serde(rename = "@lang")]
+    pub lang: String,
+    /// Localised name.
+    #[serde(rename = "$text")]
+    pub name: String,
+}
+
+/// ...
+#[derive(Clone, Debug, Default, PartialEq, Serialize, Deserialize)]
+pub struct Label {
+    /// ...
+    #[serde(rename = "@name")]
+    pub name: String,
+    /// ...
+    #[serde(rename = "@elidable", default, skip_serializing_if = "is_false")]
+    pub elidable: bool,
+    /// ...
+    #[serde(rename = "@oldersibling", default, skip_serializing_if = "is_false")]
+    pub older_sibling: bool,
+    /// ...
+    #[serde(rename = "@uservalue")]
+    pub user_value: f32,
+    /// ...
+    #[serde(rename = "@userminimum", default)]
+    pub user_minimum: Option<f32>,
+    /// ...
+    #[serde(rename = "@usermaximum", default)]
+    pub user_maximum: Option<f32>,
+    /// ...
+    #[serde(rename = "@linkeduservalue", default)]
+    pub linked_user_value: Option<f32>,
+    /// ...
+    #[serde(rename = "labelname", default, skip_serializing_if = "Vec::is_empty")]
+    pub names: Vec<LabelName>,
 }
 
 fn is_false(value: &bool) -> bool {
@@ -162,6 +216,53 @@ pub struct Condition {
     pub maximum: Option<f32>,
 }
 
+/// Describes a single variable font.
+#[derive(Clone, Debug, Default, PartialEq, Serialize, Deserialize)]
+pub struct VariableFont {
+    /// The name of the variable font.
+    #[serde(rename = "@name")]
+    pub name: String,
+    /// The optional file name of the variable font.
+    #[serde(rename = "@filename", default, skip_serializing_if = "Option::is_none")]
+    pub filename: Option<String>,
+    /// The axis subset the variable font represents.
+    #[serde(rename = "axis-subsets", with = "serde_impls::axis_subsets")]
+    pub axis_subsets: Vec<AxisSubset>,
+    /// Additional arbitrary user data
+    #[serde(default, with = "serde_plist", skip_serializing_if = "Dictionary::is_empty")]
+    pub lib: Dictionary,
+}
+
+/// Describes a single axis subset for a variable font.
+#[derive(Clone, Debug, PartialEq, Serialize, Deserialize)]
+#[serde(untagged)]
+pub enum AxisSubset {
+    /// Describes a range of an axis.
+    Range {
+        /// The name of the axis under consideration.
+        #[serde(rename = "@name")]
+        name: String,
+        /// Optionally, the lower end of the range, in user coordinates
+        #[serde(rename = "@userminimum", default, skip_serializing_if = "Option::is_none")]
+        user_minimum: Option<f64>,
+        /// Optionally, the upper end of the range, in user coordinates
+        #[serde(rename = "@usermaximum", default, skip_serializing_if = "Option::is_none")]
+        user_maximum: Option<f64>,
+        /// Optionally, the new default value of subset axis, in user coordinates.
+        #[serde(rename = "@userdefault", default, skip_serializing_if = "Option::is_none")]
+        user_default: Option<f64>,
+    },
+    /// Describes a single point of an axis.
+    Discrete {
+        /// The name of the axis under consideration.
+        #[serde(rename = "@name")]
+        name: String,
+        /// The single point of the axis.
+        #[serde(rename = "@uservalue")]
+        user_value: f64,
+    },
+}
+
 /// A [source].
 ///
 /// [source]: https://fonttools.readthedocs.io/en/latest/designspaceLib/xml.html#id25
@@ -335,6 +436,7 @@ mod serde_impls {
                 {
                     use ::serde::Deserialize as _;
                     #[derive(::serde::Deserialize)]
+                    #[serde(rename_all = "kebab-case")]
                     struct Helper {
                         $field_name: Vec<$inner>,
                     }
@@ -350,6 +452,7 @@ mod serde_impls {
                 {
                     use ::serde::Serialize as _;
                     #[derive(::serde::Serialize)]
+                    #[serde(rename_all = "kebab-case")]
                     struct Helper<'a> {
                         $field_name: &'a [$inner],
                     }
@@ -364,6 +467,9 @@ mod serde_impls {
     serde_from_field!(instances, instance, crate::designspace::Instance);
     serde_from_field!(axes, axis, crate::designspace::Axis);
     serde_from_field!(sources, source, crate::designspace::Source);
+    serde_from_field!(variable_fonts, variable_font, crate::designspace::VariableFont);
+    serde_from_field!(axis_subsets, axis_subset, crate::designspace::AxisSubset);
+    serde_from_field!(labels, label, crate::designspace::Label);
 }
 
 #[cfg(test)]
@@ -575,4 +681,79 @@ mod tests {
             }
         );
     }
+
+    #[test]
+    fn load_save_round_trip_mutatorsans2() {
+        // Given
+        let dir = TempDir::new().unwrap();
+        let ds_test_save_location = dir.path().join("MutatorSans2.designspace");
+
+        // When
+        let ds_initial = DesignSpaceDocument::load("testdata/MutatorSans2.designspace").unwrap();
+        ds_initial.save(&ds_test_save_location).expect("failed to save designspace");
+        let ds_after = DesignSpaceDocument::load(ds_test_save_location)
+            .expect("failed to load saved designspace");
+
+        let mut vf_lib = Dictionary::new();
+        let mut vf_fontinfo = Dictionary::new();
+        vf_fontinfo.insert("familyName".into(), "My Font Narrow VF".into());
+        vf_fontinfo.insert("styleName".into(), "Regular".into());
+        vf_fontinfo.insert("postscriptFontName".into(), "MyFontNarrVF-Regular".into());
+        vf_fontinfo
+            .insert("trademark".into(), "My Font Narrow VF is a registered trademark...".into());
+        vf_lib.insert("public.fontInfo".into(), vf_fontinfo.into());
+
+        // Then
+        assert_eq!(
+            &ds_after.axes,
+            &[
+                Axis {
+                    name: "width".into(),
+                    tag: "wdth".into(),
+                    default: 0.0,
+                    hidden: false,
+                    minimum: Some(0.0),
+                    maximum: Some(1000.0),
+                    values: None,
+                    map: None,
+                    label_names: vec![],
+                    labels: vec![]
+                },
+                Axis {
+                    name: "weight".into(),
+                    tag: "wght".into(),
+                    default: 0.0,
+                    hidden: false,
+                    minimum: Some(0.0),
+                    maximum: Some(1000.0),
+                    values: None,
+                    map: None,
+                    label_names: vec![
+                        LabelName { lang: "fa-IR".into(), name: "قطر".into() },
+                        LabelName { lang: "en".into(), name: "Wéíght".into() },
+                    ],
+                    labels: vec![]
+                }
+            ]
+        );
+
+        assert_eq!(
+            &ds_after.variable_fonts,
+            &[VariableFont {
+                name: "MyFontNarrVF".into(),
+                filename: None,
+                axis_subsets: vec![
+                    AxisSubset::Range {
+                        name: "Weight".into(),
+                        user_minimum: None,
+                        user_maximum: None,
+                        user_default: None
+                    },
+                    AxisSubset::Discrete { name: "Width".into(), user_value: 75.0 },
+                ],
+                lib: vf_lib
+            }]
+        );
+        assert_eq!(ds_initial, ds_after);
+    }
 }
diff --git a/src/fontinfo.rs b/src/fontinfo.rs
index cf8a2ed8..d2b03206 100644
--- a/src/fontinfo.rs
+++ b/src/fontinfo.rs
@@ -489,6 +489,8 @@ struct FontInfoV1 {
     year: Option<Integer>,           // Does not appear in spec but ufoLib.
 }
 
+// TODO: add from_bytes method for loading fontinfo from designspace libs
+
 impl FontInfo {
     /// Returns [`FontInfo`] from a file, upgrading from the supplied `format_version` to the highest
     /// internally supported version.
diff --git a/src/serde_xml_plist.rs b/src/serde_xml_plist.rs
index 5638be81..42c8ac22 100644
--- a/src/serde_xml_plist.rs
+++ b/src/serde_xml_plist.rs
@@ -32,6 +32,7 @@ mod de {
     use super::*;
     use serde::de::{Error as DeError, Visitor};
     use serde::Deserialize;
+    use std::borrow::Cow;
     use std::fmt::Display;
     use std::marker::PhantomData;
     use std::str::FromStr;
@@ -106,15 +107,21 @@ mod de {
             Some(ValueKeyword::Data) => {
                 //FIXME: remove this + base64 dep when/if we merge
                 //<https://github.com/ebarnard/rust-plist/pull/122>
-                let b64_str = map.next_value::<&str>()?;
+                // NOTE: Use Cow here because serde needs ownership if it has
+                // to modify the string in any form, e.g. when deserializing
+                // from a Designspace file.
+                let b64_str = map.next_value::<Cow<'_, str>>()?;
                 base64_standard
-                    .decode(b64_str)
+                    .decode(&*b64_str)
                     .map(Value::Data)
                     .map_err(|e| A::Error::custom(format!("Invalid XML data: '{e}'")))
             }
             Some(ValueKeyword::Date) => {
-                let date_str = map.next_value::<&str>()?;
-                plist::Date::from_xml_format(date_str).map_err(A::Error::custom).map(Value::Date)
+                // NOTE: Use Cow here because serde needs ownership if it has
+                // to modify the string in any form, e.g. when deserializing
+                // from a Designspace file.
+                let date_str = map.next_value::<Cow<'_, str>>()?;
+                plist::Date::from_xml_format(&date_str).map_err(A::Error::custom).map(Value::Date)
             }
             Some(ValueKeyword::Real) => map.next_value::<f64>().map(Value::Real),
             Some(ValueKeyword::Integer) => {
diff --git a/testdata/MutatorSans2.designspace b/testdata/MutatorSans2.designspace
new file mode 100644
index 00000000..743b5c76
--- /dev/null
+++ b/testdata/MutatorSans2.designspace
@@ -0,0 +1,227 @@
+<?xml version='1.0' encoding='UTF-8'?>
+<designspace format="5.0">
+  <axes>
+    <axis tag="wdth" name="width" minimum="0" maximum="1000" default="0"/>
+    <axis tag="wght" name="weight" minimum="0" maximum="1000" default="0">
+        <labelname xml:lang="fa-IR">قطر</labelname>
+        <labelname xml:lang="en">Wéíght</labelname>
+        <labels>
+            <label userminimum="200" uservalue="200" usermaximum="250" name="Extra Light">
+                <labelname xml:lang="de">Extraleicht</labelname>
+                <labelname xml:lang="fr">Extra léger</labelname>
+            </label>
+            <label userminimum="350" uservalue="400" usermaximum="450" name="Regular" elidable="true" />
+        </labels>
+    </axis>
+  </axes>
+  <rules processing="last">
+    <rule name="fold_I_serifs">
+      <conditionset>
+        <condition name="width" minimum="0" maximum="328"/>
+      </conditionset>
+      <sub name="I" with="I.narrow"/>
+    </rule>
+    <rule name="fold_S_terminals">
+      <conditionset>
+        <condition name="width" minimum="0" maximum="1000"/>
+        <condition name="weight" minimum="0" maximum="500"/>
+      </conditionset>
+      <sub name="S" with="S.closed"/>
+    </rule>
+  </rules>
+  <variable-fonts>
+    <variable-font name="MyFontNarrVF">
+        <axis-subsets>
+            <axis-subset name="Weight"/>
+            <axis-subset name="Width" uservalue="75"/>
+        </axis-subsets>
+        <lib>
+            <dict>
+                <key>public.fontInfo</key>
+                <dict>
+                    <key>familyName</key>
+                    <string>My Font Narrow VF</string>
+                    <key>styleName</key>
+                    <string>Regular</string>
+                    <key>postscriptFontName</key>
+                    <string>MyFontNarrVF-Regular</string>
+                    <key>trademark</key>
+                    <string>My Font Narrow VF is a registered trademark...</string>
+                </dict>
+            </dict>
+        </lib>
+    </variable-font>
+  </variable-fonts>
+  <sources>
+    <source filename="MutatorSansLightCondensed.ufo" familyname="MutatorMathTest" stylename="LightCondensed">
+      <lib copy="1"/>
+      <groups copy="1"/>
+      <features copy="1"/>
+      <info copy="1"/>
+      <location>
+        <dimension name="width" xvalue="0"/>
+        <dimension name="weight" xvalue="0"/>
+      </location>
+    </source>
+    <source filename="MutatorSansBoldCondensed.ufo" familyname="MutatorMathTest" stylename="BoldCondensed">
+      <location>
+        <dimension name="width" xvalue="0"/>
+        <dimension name="weight" xvalue="1000"/>
+      </location>
+    </source>
+    <source filename="MutatorSansLightWide.ufo" familyname="MutatorMathTest" stylename="LightWide">
+      <location>
+        <dimension name="width" xvalue="1000"/>
+        <dimension name="weight" xvalue="0"/>
+      </location>
+    </source>
+    <source filename="MutatorSansBoldWide.ufo" familyname="MutatorMathTest" stylename="BoldWide">
+      <location>
+        <dimension name="width" xvalue="1000"/>
+        <dimension name="weight" xvalue="1000"/>
+      </location>
+    </source>
+    <source filename="MutatorSansLightCondensed.ufo" familyname="MutatorMathTest" stylename="LightCondensed" layer="support.crossbar">
+      <location>
+        <dimension name="width" xvalue="0"/>
+        <dimension name="weight" xvalue="700"/>
+      </location>
+    </source>
+    <source filename="MutatorSansLightCondensed.ufo" familyname="MutatorMathTest" stylename="LightCondensed" layer="support.S.wide">
+      <location>
+        <dimension name="width" xvalue="1000"/>
+        <dimension name="weight" xvalue="700"/>
+      </location>
+    </source>
+    <source filename="MutatorSansLightCondensed.ufo" familyname="MutatorMathTest" stylename="LightCondensed" layer="support.S.middle">
+      <location>
+        <dimension name="width" xvalue="569.078000"/>
+        <dimension name="weight" xvalue="700"/>
+      </location>
+    </source>
+  </sources>
+  <instances>
+    <instance familyname="MutatorSans" stylename="LightCondensed" filename="instances/MutatorMathTest-LightCondensed.ufo" postscriptfontname="MutatorMathTest-LightCondensed">
+      <location>
+        <dimension name="width" xvalue="0"/>
+        <dimension name="weight" xvalue="0"/>
+      </location>
+      <kerning/>
+      <info/>
+    </instance>
+    <instance familyname="MutatorSans" stylename="BoldCondensed" filename="instances/MutatorMathTest-BoldCondensed.ufo" postscriptfontname="MutatorMathTest-BoldCondensed">
+      <location>
+        <dimension name="width" xvalue="0"/>
+        <dimension name="weight" xvalue="1000"/>
+      </location>
+      <kerning/>
+      <info/>
+    </instance>
+    <instance familyname="MutatorSans" stylename="LightWide" filename="instances/MutatorMathTest-LightWide.ufo" postscriptfontname="MutatorMathTest-LightWide">
+      <location>
+        <dimension name="width" xvalue="1000"/>
+        <dimension name="weight" xvalue="0"/>
+      </location>
+      <kerning/>
+      <info/>
+    </instance>
+    <instance familyname="MutatorSans" stylename="BoldWide" filename="instances/MutatorMathTest-BoldWide.ufo" postscriptfontname="MutatorMathTest-BoldWide">
+      <location>
+        <dimension name="width" xvalue="1000"/>
+        <dimension name="weight" xvalue="1000"/>
+      </location>
+      <kerning/>
+      <info/>
+    </instance>
+    <instance familyname="MutatorSans" stylename="Medium_Narrow_I" filename="instances/MutatorMathTest-Medium_Narrow_I.ufo" postscriptfontname="MutatorMathTest-Medium_Narrow_I">
+      <location>
+        <dimension name="width" xvalue="327"/>
+        <dimension name="weight" xvalue="500"/>
+      </location>
+      <kerning/>
+      <info/>
+    </instance>
+    <instance familyname="MutatorSans" stylename="Two" filename="instances/MutatorMathTest-Two.ufo" postscriptfontname="MutatorMathTest-Two">
+      <location>
+        <dimension name="width" xvalue="569.078000"/>
+        <dimension name="weight" xvalue="1000"/>
+      </location>
+      <kerning/>
+      <info/>
+    </instance>
+    <instance familyname="MutatorSans" stylename="One" filename="instances/MutatorMathTest-One.ufo" postscriptfontname="MutatorMathTest-One">
+      <location>
+        <dimension name="width" xvalue="1000"/>
+        <dimension name="weight" xvalue="500"/>
+      </location>
+      <kerning/>
+      <info/>
+    </instance>
+    <instance familyname="MutatorSans" stylename="width_794.52_weight_775.61" filename="instances/MutatorSans-width_794.52_weight_775.61.ufo" postscriptfontname="MutatorSans-width_794.52_weight_775.61">
+      <location>
+        <dimension name="width" xvalue="794.522000"/>
+        <dimension name="weight" xvalue="775.609000"/>
+      </location>
+      <kerning/>
+      <info/>
+    </instance>
+    <instance familyname="MutatorSans" stylename="width_93.05_weight_658.60" filename="instances/MutatorSans_width_93.05_weight_658.60.ufo">
+      <location>
+        <dimension name="width" xvalue="93.052000"/>
+        <dimension name="weight" xvalue="658.597000"/>
+      </location>
+      <kerning/>
+      <info/>
+    </instance>
+    <instance familyname="MutatorSans" stylename="Medium_Wide_I" filename="instances/MutatorMathTest-Medium_Narrow_I.ufo" postscriptfontname="MutatorMathTest-Medium_Narrow_I">
+      <location>
+        <dimension name="width" xvalue="328"/>
+        <dimension name="weight" xvalue="500"/>
+      </location>
+      <kerning/>
+      <info/>
+    </instance>
+    <instance familyname="MutatorSans" stylename="width_35.33_weight_854.83" filename="instances/MutatorSans_width_35.33_weight_854.83.ufo">
+      <location>
+        <dimension name="width" xvalue="35.329171"/>
+        <dimension name="weight" xvalue="854.834192"/>
+      </location>
+      <kerning/>
+      <info/>
+    </instance>
+    <instance familyname="MutatorSans" stylename="width_794.52_weight_775.61" filename="instances/MutatorSans_width_794.52_weight_775.61.ufo">
+      <location>
+        <dimension name="width" xvalue="500"/>
+        <dimension name="weight" xvalue="500"/>
+      </location>
+      <kerning/>
+      <info/>
+    </instance>
+  </instances>
+  <lib>
+                <dict>
+                  <key>hasLoadedLib</key>
+                  <string>Absolutely!</string>
+                  <key>anArray</key>
+                  <array>
+                    <dict>
+                      <key>class</key>
+                      <string>aristocracy</string>
+                      <key>heft</key>
+                      <real>42.42</real>
+                    </dict>
+                    <integer>6</integer>
+                  </array>
+                  <key>isWorking</key>
+                  <true/>
+                  <key>isBroken</key>
+                  <false/>
+                  <key>bestBefore</key>
+                  <date>2345-01-24T23:22:21Z</date>
+                  <key>payload</key>
+                  <data>
+                  dSBnb3QgMHduZWQ=
+                  </data>
+                </dict>
+  </lib>
+</designspace>