diff --git a/commons/zenoh-protocol/src/network/mod.rs b/commons/zenoh-protocol/src/network/mod.rs
index 6af7fef243..0e198ddf0f 100644
--- a/commons/zenoh-protocol/src/network/mod.rs
+++ b/commons/zenoh-protocol/src/network/mod.rs
@@ -110,6 +110,18 @@ impl NetworkMessage {
         true
     }
 
+    #[inline]
+    pub fn is_express(&self) -> bool {
+        match &self.body {
+            NetworkBody::Push(msg) => msg.ext_qos.is_express(),
+            NetworkBody::Request(msg) => msg.ext_qos.is_express(),
+            NetworkBody::Response(msg) => msg.ext_qos.is_express(),
+            NetworkBody::ResponseFinal(msg) => msg.ext_qos.is_express(),
+            NetworkBody::Declare(msg) => msg.ext_qos.is_express(),
+            NetworkBody::OAM(msg) => msg.ext_qos.is_express(),
+        }
+    }
+
     #[inline]
     pub fn is_droppable(&self) -> bool {
         if !self.is_reliable() {
@@ -117,11 +129,11 @@ impl NetworkMessage {
         }
 
         let cc = match &self.body {
-            NetworkBody::Declare(msg) => msg.ext_qos.get_congestion_control(),
             NetworkBody::Push(msg) => msg.ext_qos.get_congestion_control(),
             NetworkBody::Request(msg) => msg.ext_qos.get_congestion_control(),
             NetworkBody::Response(msg) => msg.ext_qos.get_congestion_control(),
             NetworkBody::ResponseFinal(msg) => msg.ext_qos.get_congestion_control(),
+            NetworkBody::Declare(msg) => msg.ext_qos.get_congestion_control(),
             NetworkBody::OAM(msg) => msg.ext_qos.get_congestion_control(),
         };
 
@@ -131,11 +143,11 @@ impl NetworkMessage {
     #[inline]
     pub fn priority(&self) -> Priority {
         match &self.body {
-            NetworkBody::Declare(msg) => msg.ext_qos.get_priority(),
             NetworkBody::Push(msg) => msg.ext_qos.get_priority(),
             NetworkBody::Request(msg) => msg.ext_qos.get_priority(),
             NetworkBody::Response(msg) => msg.ext_qos.get_priority(),
             NetworkBody::ResponseFinal(msg) => msg.ext_qos.get_priority(),
+            NetworkBody::Declare(msg) => msg.ext_qos.get_priority(),
             NetworkBody::OAM(msg) => msg.ext_qos.get_priority(),
         }
     }
diff --git a/io/zenoh-transport/src/common/pipeline.rs b/io/zenoh-transport/src/common/pipeline.rs
index 3968eabdf5..516834fa41 100644
--- a/io/zenoh-transport/src/common/pipeline.rs
+++ b/io/zenoh-transport/src/common/pipeline.rs
@@ -161,12 +161,18 @@ impl StageIn {
         }
 
         macro_rules! zretok {
-            ($batch:expr) => {{
-                let bytes = $batch.len();
-                *c_guard = Some($batch);
-                drop(c_guard);
-                self.s_out.notify(bytes);
-                return true;
+            ($batch:expr, $msg:expr) => {{
+                if $msg.is_express() {
+                    // Move out existing batch
+                    self.s_out.move_batch($batch);
+                    return true;
+                } else {
+                    let bytes = $batch.len();
+                    *c_guard = Some($batch);
+                    drop(c_guard);
+                    self.s_out.notify(bytes);
+                    return true;
+                }
             }};
         }
 
@@ -174,7 +180,7 @@ impl StageIn {
         let mut batch = zgetbatch_rets!(false);
         // Attempt the serialization on the current batch
         let e = match batch.encode(&*msg) {
-            Ok(_) => zretok!(batch),
+            Ok(_) => zretok!(batch, msg),
             Err(e) => e,
         };
 
@@ -194,7 +200,7 @@ impl StageIn {
         if let BatchError::NewFrame = e {
             // Attempt a serialization with a new frame
             if batch.encode((&*msg, &frame)).is_ok() {
-                zretok!(batch);
+                zretok!(batch, msg);
             }
         }
 
@@ -206,7 +212,7 @@ impl StageIn {
 
         // Attempt a second serialization on fully empty batch
         if batch.encode((&*msg, &frame)).is_ok() {
-            zretok!(batch);
+            zretok!(batch, msg);
         }
 
         // The second serialization attempt has failed. This means that the message is