diff --git a/src/lib.rs b/src/lib.rs
index 349b457..e3c9778 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -202,6 +202,9 @@
 /// the interface that initiated the request. The application code has knowledge of the request, so
 /// it has to convert `SuccessArgs` into/from a specific success args structure that matches the
 /// request.
+///
+/// The current specialized success arguments types are:
+/// * `FFA_FEATURES` - [`SuccessArgsFeatures`]
 #[derive(Debug, Eq, PartialEq, Clone, Copy)]
 pub enum SuccessArgs {
     Args32([u32; 6]),
@@ -333,6 +336,31 @@
     }
 }
 
+/// `FFA_FEATURES` specific success argument structure. This type needs further specialization based
+/// on 'FF-A function ID or Feature ID' field of the preceeding `FFA_FEATURES` request.
+#[derive(Debug, Eq, PartialEq, Clone, Copy)]
+pub struct SuccessArgsFeatures {
+    pub properties: [u32; 2],
+}
+
+impl From<SuccessArgsFeatures> for SuccessArgs {
+    fn from(value: SuccessArgsFeatures) -> Self {
+        Self::Args32([value.properties[0], value.properties[1], 0, 0, 0, 0])
+    }
+}
+
+impl TryFrom<SuccessArgs> for SuccessArgsFeatures {
+    type Error = Error;
+
+    fn try_from(value: SuccessArgs) -> Result<Self, Self::Error> {
+        let args = value.try_get_args32()?;
+
+        Ok(Self {
+            properties: [args[0], args[1]],
+        })
+    }
+}
+
 /// RXTX buffer descriptor, used by `FFA_RXTX_MAP`.
 #[derive(Debug, Eq, PartialEq, Clone, Copy)]
 pub enum RxTxAddr {