diff --git a/der/src/asn1.rs b/der/src/asn1.rs
index 7bfe55af4..fce92c17b 100644
--- a/der/src/asn1.rs
+++ b/der/src/asn1.rs
@@ -5,6 +5,7 @@
 mod internal_macros;
 
 mod any;
+mod application;
 mod bit_string;
 #[cfg(feature = "alloc")]
 mod bmp_string;
@@ -37,7 +38,7 @@ pub use self::{
     bit_string::{BitStringIter, BitStringRef},
     choice::Choice,
     //context_specific::{ContextSpecific, ContextSpecificRef},
-    context_specific::ContextSpecific,
+    context_specific::{ContextSpecificExplicit, ContextSpecificImplicit},
     custom_class::{AnyCustomClassExplicit, AnyCustomClassImplicit},
     generalized_time::GeneralizedTime,
     ia5_string::Ia5StringRef,
@@ -46,7 +47,7 @@ pub use self::{
     octet_string::OctetStringRef,
     printable_string::PrintableStringRef,
     //private::{Private, PrivateRef},
-    private::Private,
+    private::{PrivateExplicit, PrivateImplicit},
     sequence::{Sequence, SequenceRef},
     sequence_of::{SequenceOf, SequenceOfIter},
     set_of::{SetOf, SetOfIter},
diff --git a/der/src/asn1/application.rs b/der/src/asn1/application.rs
new file mode 100644
index 000000000..0ded9b993
--- /dev/null
+++ b/der/src/asn1/application.rs
@@ -0,0 +1,11 @@
+//! Application field.
+
+use crate::tag::CLASS_APPLICATION;
+
+use super::custom_class::{CustomClassExplicit, CustomClassImplicit};
+
+/// Application class, EXPLICIT
+pub type ApplicationExplicit<const TAG: u16, T> = CustomClassExplicit<T, TAG, CLASS_APPLICATION>;
+
+/// Application class, IMPLICIT
+pub type ApplicationImplicit<const TAG: u16, T> = CustomClassImplicit<T, TAG, CLASS_APPLICATION>;
diff --git a/der/src/asn1/context_specific.rs b/der/src/asn1/context_specific.rs
index 8a714d04a..07312af0d 100644
--- a/der/src/asn1/context_specific.rs
+++ b/der/src/asn1/context_specific.rs
@@ -8,11 +8,12 @@ use crate::{
 use core::cmp::Ordering;
 
 use super::custom_class::{
-    self, AnyCustomClassExplicit, AnyCustomClassImplicit, CustomClass, CustomClassImplicit,
+    self, AnyCustomClassExplicit, AnyCustomClassImplicit, CustomClassExplicit, CustomClassImplicit,
 };
 
 /// Context-specific class, EXPLICIT
-pub type ContextSpecific<const TAG: u16, T> = CustomClass<T, TAG, CLASS_CONTEXT_SPECIFIC>;
+pub type ContextSpecificExplicit<const TAG: u16, T> =
+    CustomClassExplicit<T, TAG, CLASS_CONTEXT_SPECIFIC>;
 
 /// Context-specific class, IMPLICIT
 pub type ContextSpecificImplicit<const TAG: u16, T> =
@@ -291,7 +292,7 @@ pub fn decode_explicit<'a, R: Reader<'a>, T: Decode<'a>>(
 #[cfg(test)]
 #[allow(clippy::unwrap_used)]
 mod tests {
-    use super::ContextSpecific;
+    use super::ContextSpecificExplicit;
     use crate::{
         asn1::{context_specific::ContextSpecificImplicit, BitStringRef},
         Decode, Encode, SliceReader, TagMode, TagNumber,
@@ -304,7 +305,8 @@ mod tests {
 
     #[test]
     fn round_trip() {
-        let field = ContextSpecific::<1, BitStringRef<'_>>::from_der(EXAMPLE_BYTES).unwrap();
+        let field =
+            ContextSpecificExplicit::<1, BitStringRef<'_>>::from_der(EXAMPLE_BYTES).unwrap();
         assert_eq!(
             field.value,
             BitStringRef::from_bytes(&EXAMPLE_BYTES[5..]).unwrap()
@@ -320,20 +322,20 @@ mod tests {
         // Empty message
         let mut reader = SliceReader::new(&[]).unwrap();
         assert_eq!(
-            ContextSpecific::<0, u8>::decode_optional(&mut reader).unwrap(),
+            ContextSpecificExplicit::<0, u8>::decode_optional(&mut reader).unwrap(),
             None
         );
 
         // Message containing a non-context-specific type
         let mut reader = SliceReader::new(&hex!("020100")).unwrap();
         assert_eq!(
-            ContextSpecific::<0, u8>::decode_optional(&mut reader).unwrap(),
+            ContextSpecificExplicit::<0, u8>::decode_optional(&mut reader).unwrap(),
             None
         );
 
         // Message containing an EXPLICIT context-specific field
         let mut reader = SliceReader::new(&hex!("A003020100")).unwrap();
-        let field = ContextSpecific::<0, u8>::decode_optional(&mut reader)
+        let field = ContextSpecificExplicit::<0, u8>::decode_optional(&mut reader)
             .unwrap()
             .unwrap();
 
@@ -365,7 +367,7 @@ mod tests {
     #[test]
     fn context_specific_skipping_unknown_field() {
         let mut reader = SliceReader::new(&hex!("A003020100A103020101")).unwrap();
-        let field = ContextSpecific::<1, u8>::decode_optional(&mut reader)
+        let field = ContextSpecificExplicit::<1, u8>::decode_optional(&mut reader)
             .unwrap()
             .unwrap();
         assert_eq!(field.value, 1);
@@ -375,7 +377,7 @@ mod tests {
     fn context_specific_returns_none_on_greater_tag_number() {
         let mut reader = SliceReader::new(&hex!("A103020101")).unwrap();
         assert_eq!(
-            ContextSpecific::<0, u8>::decode_optional(&mut reader).unwrap(),
+            ContextSpecificExplicit::<0, u8>::decode_optional(&mut reader).unwrap(),
             None
         );
     }
diff --git a/der/src/asn1/custom_class.rs b/der/src/asn1/custom_class.rs
index 973856077..5c1e5b680 100644
--- a/der/src/asn1/custom_class.rs
+++ b/der/src/asn1/custom_class.rs
@@ -13,7 +13,7 @@ use crate::{
 /// This type decodes/encodes a field which is specific to a particular context
 /// and is identified by a [`TagNumber`].
 #[derive(Copy, Clone, Debug, Eq, PartialEq, PartialOrd, Ord)]
-pub struct CustomClass<T, const TAG: u16, const CLASS: u8> {
+pub struct CustomClassExplicit<T, const TAG: u16, const CLASS: u8> {
     /// Value of the field.
     pub value: T,
 }
@@ -28,7 +28,7 @@ pub struct CustomClassImplicit<T, const TAG: u16, const CLASS: u8> {
     pub value: T,
 }
 
-impl<T, const TAG: u16, const CLASS: u8> CustomClass<T, TAG, CLASS> {
+impl<T, const TAG: u16, const CLASS: u8> CustomClassExplicit<T, TAG, CLASS> {
     /// Attempt to decode an `EXPLICIT` ASN.1 custom-tagged field with the
     /// provided [`TagNumber`].
     ///
@@ -186,7 +186,7 @@ where
     }
 }
 
-impl<'a, T, const TAG: u16, const CLASS: u8> Choice<'a> for CustomClass<T, TAG, CLASS>
+impl<'a, T, const TAG: u16, const CLASS: u8> Choice<'a> for CustomClassExplicit<T, TAG, CLASS>
 where
     T: Decode<'a> + Tagged,
 {
@@ -206,7 +206,7 @@ where
     }
 }
 
-impl<'a, T, const TAG: u16, const CLASS: u8> Decode<'a> for CustomClass<T, TAG, CLASS>
+impl<'a, T, const TAG: u16, const CLASS: u8> Decode<'a> for CustomClassExplicit<T, TAG, CLASS>
 where
     T: Decode<'a>,
 {
@@ -243,7 +243,7 @@ where
     }
 }
 
-impl<T, const TAG: u16, const CLASS: u8> EncodeValue for CustomClass<T, TAG, CLASS>
+impl<T, const TAG: u16, const CLASS: u8> EncodeValue for CustomClassExplicit<T, TAG, CLASS>
 where
     T: EncodeValue + Tagged,
 {
@@ -287,7 +287,7 @@ pub const fn expected_tag_constructed(class: Class, number: TagNumber, construct
     }
 }
 
-impl<T, const TAG: u16, const CLASS: u8> Tagged for CustomClass<T, TAG, CLASS> {
+impl<T, const TAG: u16, const CLASS: u8> Tagged for CustomClassExplicit<T, TAG, CLASS> {
     fn tag(&self) -> Tag {
         expected_tag_constructed(Class::from(CLASS), TagNumber(TAG), true)
     }
@@ -303,7 +303,8 @@ where
     }
 }
 
-impl<'a, T, const TAG: u16, const CLASS: u8> TryFrom<AnyRef<'a>> for CustomClass<T, TAG, CLASS>
+impl<'a, T, const TAG: u16, const CLASS: u8> TryFrom<AnyRef<'a>>
+    for CustomClassExplicit<T, TAG, CLASS>
 where
     T: Decode<'a>,
 {
@@ -353,7 +354,7 @@ where
     }
 }
 
-impl<T, const TAG: u16, const CLASS: u8> ValueOrd for CustomClass<T, TAG, CLASS>
+impl<T, const TAG: u16, const CLASS: u8> ValueOrd for CustomClassExplicit<T, TAG, CLASS>
 where
     T: DerOrd,
 {
diff --git a/der/src/asn1/private.rs b/der/src/asn1/private.rs
index c6e7f1b59..e709ffa79 100644
--- a/der/src/asn1/private.rs
+++ b/der/src/asn1/private.rs
@@ -8,16 +8,10 @@ use crate::{
 use crate::{Class, FixedTag};
 use core::cmp::Ordering;
 
-use super::custom_class::{CustomClass, CustomClassImplicit};
-
-/// Application class, EXPLICIT
-pub type Application<const TAG: u16, T> = CustomClass<T, TAG, CLASS_APPLICATION>;
+use super::custom_class::{CustomClassExplicit, CustomClassImplicit};
 
 /// Private class, EXPLICIT
-pub type Private<const TAG: u16, T> = CustomClass<T, TAG, CLASS_PRIVATE>;
-
-/// Application class, IMPLICIT
-pub type ApplicationImplicit<const TAG: u16, T> = CustomClassImplicit<T, TAG, CLASS_APPLICATION>;
+pub type PrivateExplicit<const TAG: u16, T> = CustomClassExplicit<T, TAG, CLASS_PRIVATE>;
 
 /// Private class, IMPLICIT
 pub type PrivateImplicit<const TAG: u16, T> = CustomClassImplicit<T, TAG, CLASS_PRIVATE>;
@@ -75,7 +69,7 @@ pub type PrivateImplicit<const TAG: u16, T> = CustomClassImplicit<T, TAG, CLASS_
 #[cfg(test)]
 #[allow(clippy::unwrap_used)]
 mod tests {
-    use super::Private;
+    use super::PrivateExplicit;
     use super::PrivateImplicit;
     use crate::{asn1::BitStringRef, Decode, Encode, SliceReader, TagMode, TagNumber};
     use hex_literal::hex;
@@ -86,7 +80,7 @@ mod tests {
 
     #[test]
     fn round_trip() {
-        let field = Private::<1, BitStringRef<'_>>::from_der(EXAMPLE_BYTES).unwrap();
+        let field = PrivateExplicit::<1, BitStringRef<'_>>::from_der(EXAMPLE_BYTES).unwrap();
         assert_eq!(
             field.value,
             BitStringRef::from_bytes(&EXAMPLE_BYTES[5..]).unwrap()
@@ -117,7 +111,7 @@ mod tests {
 
         // Message containing an EXPLICIT private field
         let mut reader = SliceReader::new(&hex!("C003020100")).unwrap();
-        let field = Private::<0, u8>::decode_optional(&mut reader)
+        let field = PrivateExplicit::<0, u8>::decode_optional(&mut reader)
             .unwrap()
             .unwrap();
 
@@ -141,7 +135,7 @@ mod tests {
     #[test]
     fn private_not_skipping_unknown_field() {
         let mut reader = SliceReader::new(&hex!("E003020100E103020101")).unwrap();
-        let field = Private::<1, u8>::decode_optional(&mut reader).unwrap();
+        let field = PrivateExplicit::<1, u8>::decode_optional(&mut reader).unwrap();
         assert_eq!(field, None);
     }
 
@@ -149,7 +143,7 @@ mod tests {
     fn private_returns_none_on_unequal_tag_number() {
         let mut reader = SliceReader::new(&hex!("C103020101")).unwrap();
         assert_eq!(
-            Private::<0, u8>::decode_optional(&mut reader).unwrap(),
+            PrivateExplicit::<0, u8>::decode_optional(&mut reader).unwrap(),
             None
         );
     }
diff --git a/der/src/reader.rs b/der/src/reader.rs
index b67779213..91e0f5aa9 100644
--- a/der/src/reader.rs
+++ b/der/src/reader.rs
@@ -5,7 +5,7 @@ pub(crate) mod pem;
 pub(crate) mod slice;
 
 use crate::{
-    asn1::{AnyCustomClassExplicit, AnyCustomClassImplicit, ContextSpecific},
+    asn1::{AnyCustomClassExplicit, AnyCustomClassImplicit, ContextSpecificExplicit},
     Class, Decode, DecodeValue, Encode, EncodingRules, Error, ErrorKind, FixedTag, Header, Length,
     Tag, TagMode, TagNumber,
 };