diff --git a/src/core.rs b/src/core.rs
index 76311ef..dc78c07 100644
--- a/src/core.rs
+++ b/src/core.rs
@@ -425,7 +425,9 @@ impl Addresses {
     }
 }
 
+/// Extension trait for [Deserializer]s.
 pub trait ExtDeserializer {
+    /// Try to read exactly `N` bytes.
     fn read_n_const<const N: usize>(&mut self) -> Result<[u8; N], &[u8]>;
 }
 
@@ -488,7 +490,9 @@ fn _parse_slice<'a, Ctx: 'a + Context, A: Mentionable<'a, Ctx>>(
     }
 }
 
+/// Extension trait for factories.
 pub trait ExtFactory<'a, Ctx: 'a + Context>: Factory<'a, Ctx> {
+    /// Parse the object from a slice.
     fn parse_slice(
         &self,
         slice: &[u8],
@@ -506,6 +510,7 @@ impl<'a, Ctx: 'a + Context, F: Factory<'a, Ctx>> ExtFactory<'a, Ctx> for F {
     }
 }
 
+/// [Deserializer] for slices. Used in [`ExtFactory::parse_slice`] and [`crate::std::atomic::ExtAtomic::parse_slice`].
 pub struct SliceDeserializer<'a> {
     slice: &'a [u8],
     pos: usize,
diff --git a/src/std.rs b/src/std.rs
index fccc07b..c31ff22 100644
--- a/src/std.rs
+++ b/src/std.rs
@@ -193,7 +193,9 @@ impl Display for Address {
     }
 }
 
+/// Extension trait for [Serializable]s.
 pub trait ExtSerializable: Serializable {
+    /// Serialize into a [Vec] of bytes.
     fn bytes(&self) -> Vec<u8>;
 }