diff --git a/src/Http/Headers/src/SameSiteMode.cs b/src/Http/Headers/src/SameSiteMode.cs
index 1976386c85..29c08a5984 100644
--- a/src/Http/Headers/src/SameSiteMode.cs
+++ b/src/Http/Headers/src/SameSiteMode.cs
@@ -1,13 +1,20 @@
-// Copyright (c) .NET Foundation. All rights reserved.
+// Copyright (c) .NET Foundation. All rights reserved.
 // Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
 
 namespace Microsoft.Net.Http.Headers
 {
-    // RFC Draft: https://tools.ietf.org/html/draft-ietf-httpbis-cookie-same-site-00
+    /// <summary>
+    /// Indicates if the client should include a cookie on "same-site" or "cross-site" requests.
+    /// RFC Draft: https://tools.ietf.org/html/draft-ietf-httpbis-cookie-same-site-00
+    /// </summary>
+    // This mirrors Microsoft.AspNetCore.Http.SameSiteMode
     public enum SameSiteMode
     {
+        /// <summary>No SameSite field will be set, the client should follow its default cookie policy.</summary>
         None = 0,
+        /// <summary>Indicates the client should send the cookie with "same-site" requests, and with "cross-site" top-level navigations.</summary>
         Lax,
+        /// <summary>Indicates the client should only send the cookie with "same-site" requests.</summary>
         Strict
     }
 }
diff --git a/src/Http/Http.Features/src/SameSiteMode.cs b/src/Http/Http.Features/src/SameSiteMode.cs
index 0ae4481e3d..d1af765a93 100644
--- a/src/Http/Http.Features/src/SameSiteMode.cs
+++ b/src/Http/Http.Features/src/SameSiteMode.cs
@@ -1,14 +1,20 @@
-// Copyright (c) .NET Foundation. All rights reserved.
+// Copyright (c) .NET Foundation. All rights reserved.
 // Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
 
 namespace Microsoft.AspNetCore.Http
 {
-    // RFC Draft: https://tools.ietf.org/html/draft-ietf-httpbis-cookie-same-site-00
+    /// <summary>
+    /// Used to set the SameSite field on response cookies to indicate if those cookies should be included by the client on future "same-site" or "cross-site" requests.
+    /// RFC Draft: https://tools.ietf.org/html/draft-ietf-httpbis-cookie-same-site-00
+    /// </summary>
     // This mirrors Microsoft.Net.Http.Headers.SameSiteMode
     public enum SameSiteMode
     {
+        /// <summary>No SameSite field will be set, the client should follow its default cookie policy.</summary>
         None = 0,
+        /// <summary>Indicates the client should send the cookie with "same-site" requests, and with "cross-site" top-level navigations.</summary>
         Lax,
+        /// <summary>Indicates the client should only send the cookie with "same-site" requests.</summary>
         Strict
     }
 }