diff --git a/proxy/testing/mocks/outboundhandler.go b/proxy/testing/mocks/outboundhandler.go
index 2b837f9bf..668268707 100644
--- a/proxy/testing/mocks/outboundhandler.go
+++ b/proxy/testing/mocks/outboundhandler.go
@@ -24,7 +24,7 @@ func (v *OutboundConnectionHandler) Dispatch(destination v2net.Destination, payl
 
 	v.Destination = destination
 	if !payload.IsEmpty() {
-		v.ConnOutput.Write(payload.Value)
+		v.ConnOutput.Write(payload.Bytes())
 	}
 	payload.Release()
 
diff --git a/proxy/vmess/encoding/commands.go b/proxy/vmess/encoding/commands.go
index 1a888fa00..f26abc3c2 100644
--- a/proxy/vmess/encoding/commands.go
+++ b/proxy/vmess/encoding/commands.go
@@ -40,14 +40,14 @@ func MarshalCommand(command interface{}, writer io.Writer) error {
 		return err
 	}
 
-	auth := Authenticate(buffer.Value)
+	auth := Authenticate(buffer.Bytes())
 	len := buffer.Len() + 4
 	if len > 255 {
 		return ErrCommandTooLarge
 	}
 
 	writer.Write([]byte{cmdId, byte(len), byte(auth >> 24), byte(auth >> 16), byte(auth >> 8), byte(auth)})
-	writer.Write(buffer.Value)
+	writer.Write(buffer.Bytes())
 	return nil
 }
 
diff --git a/proxy/vmess/encoding/commands_test.go b/proxy/vmess/encoding/commands_test.go
index f57099e2d..8382dc04b 100644
--- a/proxy/vmess/encoding/commands_test.go
+++ b/proxy/vmess/encoding/commands_test.go
@@ -25,7 +25,7 @@ func TestSwitchAccount(t *testing.T) {
 	err := MarshalCommand(sa, buffer)
 	assert.Error(err).IsNil()
 
-	cmd, err := UnmarshalCommand(1, buffer.Value[2:])
+	cmd, err := UnmarshalCommand(1, buffer.BytesFrom(2))
 	assert.Error(err).IsNil()
 
 	sa2, ok := cmd.(*protocol.CommandSwitchAccount)
diff --git a/proxy/vmess/io/io_test.go b/proxy/vmess/io/io_test.go
index 4bb8363bb..2d1cd2a5c 100644
--- a/proxy/vmess/io/io_test.go
+++ b/proxy/vmess/io/io_test.go
@@ -19,11 +19,11 @@ func TestAuthenticate(t *testing.T) {
 	buffer := alloc.NewBuffer().Clear()
 	buffer.AppendBytes(1, 2, 3, 4)
 	Authenticate(buffer)
-	assert.Bytes(buffer.Value).Equals([]byte{0, 8, 87, 52, 168, 125, 1, 2, 3, 4})
+	assert.Bytes(buffer.Bytes()).Equals([]byte{0, 8, 87, 52, 168, 125, 1, 2, 3, 4})
 
 	b2, err := NewAuthChunkReader(buffer).Read()
 	assert.Error(err).IsNil()
-	assert.Bytes(b2.Value).Equals([]byte{1, 2, 3, 4})
+	assert.Bytes(b2.Bytes()).Equals([]byte{1, 2, 3, 4})
 }
 
 func TestSingleIO(t *testing.T) {
@@ -39,7 +39,7 @@ func TestSingleIO(t *testing.T) {
 	reader := NewAuthChunkReader(content)
 	buffer, err := reader.Read()
 	assert.Error(err).IsNil()
-	assert.Bytes(buffer.Value).Equals([]byte("abcd"))
+	assert.String(buffer.String()).Equals("abcd")
 }
 
 func TestLargeIO(t *testing.T) {
@@ -73,7 +73,7 @@ func TestLargeIO(t *testing.T) {
 			break
 		}
 		assert.Error(err).IsNil()
-		actualContent = append(actualContent, buffer.Value...)
+		actualContent = append(actualContent, buffer.Bytes()...)
 	}
 
 	assert.Int(len(actualContent)).Equals(len(content))
diff --git a/proxy/vmess/io/reader.go b/proxy/vmess/io/reader.go
index 92ad184b7..c71ddd721 100644
--- a/proxy/vmess/io/reader.go
+++ b/proxy/vmess/io/reader.go
@@ -61,9 +61,9 @@ func (v *AuthChunkReader) Read() (*alloc.Buffer, error) {
 				return nil, io.ErrUnexpectedEOF
 			}
 		}
-		length := serial.BytesToUint16(buffer.Value[:2])
+		length := serial.BytesToUint16(buffer.BytesTo(2))
 		v.chunkLength = int(length) - 4
-		v.validator = NewValidator(serial.BytesToUint32(buffer.Value[2:6]))
+		v.validator = NewValidator(serial.BytesToUint32(buffer.BytesRange(2, 6)))
 		buffer.SliceFrom(6)
 		if buffer.Len() < v.chunkLength && v.chunkLength <= 2048 {
 			_, err := buffer.FillFrom(v.reader)
@@ -86,10 +86,10 @@ func (v *AuthChunkReader) Read() (*alloc.Buffer, error) {
 	}
 
 	if buffer.Len() < v.chunkLength {
-		v.validator.Consume(buffer.Value)
+		v.validator.Consume(buffer.Bytes())
 		v.chunkLength -= buffer.Len()
 	} else {
-		v.validator.Consume(buffer.Value[:v.chunkLength])
+		v.validator.Consume(buffer.BytesTo(v.chunkLength))
 		if !v.validator.Validate() {
 			buffer.Release()
 			return nil, errors.New("VMess|AuthChunkReader: Invalid auth.")
@@ -97,7 +97,7 @@ func (v *AuthChunkReader) Read() (*alloc.Buffer, error) {
 		leftLength := buffer.Len() - v.chunkLength
 		if leftLength > 0 {
 			v.last = alloc.NewBuffer().Clear()
-			v.last.Append(buffer.Value[v.chunkLength:])
+			v.last.Append(buffer.BytesFrom(v.chunkLength))
 			buffer.Slice(0, v.chunkLength)
 		}
 
diff --git a/proxy/vmess/io/writer.go b/proxy/vmess/io/writer.go
index ffda61387..5798cd966 100644
--- a/proxy/vmess/io/writer.go
+++ b/proxy/vmess/io/writer.go
@@ -29,7 +29,7 @@ func (v *AuthChunkWriter) Release() {
 
 func Authenticate(buffer *alloc.Buffer) {
 	fnvHash := fnv.New32a()
-	fnvHash.Write(buffer.Value)
+	fnvHash.Write(buffer.Bytes())
 	buffer.PrependHash(fnvHash)
 
 	buffer.PrependUint16(uint16(buffer.Len()))
diff --git a/transport/internet/kcp/crypt.go b/transport/internet/kcp/crypt.go
index 0bcf598b6..d0877bb9b 100644
--- a/transport/internet/kcp/crypt.go
+++ b/transport/internet/kcp/crypt.go
@@ -21,7 +21,7 @@ func (v *SimpleAuthenticator) Overhead() int {
 func (v *SimpleAuthenticator) Seal(buffer *alloc.Buffer) {
 	buffer.PrependUint16(uint16(buffer.Len()))
 	fnvHash := fnv.New32a()
-	fnvHash.Write(buffer.Value)
+	fnvHash.Write(buffer.Bytes())
 	buffer.PrependHash(fnvHash)
 
 	len := buffer.Len()
@@ -29,7 +29,7 @@ func (v *SimpleAuthenticator) Seal(buffer *alloc.Buffer) {
 	if xtra != 0 {
 		buffer.Slice(0, len+xtra)
 	}
-	xorfwd(buffer.Value)
+	xorfwd(buffer.Bytes())
 	if xtra != 0 {
 		buffer.Slice(0, len)
 	}
@@ -41,7 +41,7 @@ func (v *SimpleAuthenticator) Open(buffer *alloc.Buffer) bool {
 	if xtra != 0 {
 		buffer.Slice(0, len+xtra)
 	}
-	xorbkd(buffer.Value)
+	xorbkd(buffer.Bytes())
 	if xtra != 0 {
 		buffer.Slice(0, len)
 	}
diff --git a/transport/internet/kcp/crypt_test.go b/transport/internet/kcp/crypt_test.go
index a91e57d16..28028bab6 100644
--- a/transport/internet/kcp/crypt_test.go
+++ b/transport/internet/kcp/crypt_test.go
@@ -19,7 +19,7 @@ func TestSimpleAuthenticator(t *testing.T) {
 	auth.Seal(buffer)
 
 	assert.Bool(auth.Open(buffer)).IsTrue()
-	assert.Bytes(buffer.Value).Equals([]byte{'a', 'b', 'c', 'd', 'e', 'f', 'g'})
+	assert.Bytes(buffer.Bytes()).Equals([]byte{'a', 'b', 'c', 'd', 'e', 'f', 'g'})
 }
 
 func TestSimpleAuthenticator2(t *testing.T) {
@@ -37,8 +37,7 @@ func TestSimpleAuthenticator2(t *testing.T) {
 
 func BenchmarkSimpleAuthenticator(b *testing.B) {
 	buffer := alloc.NewLocalBuffer(2048).Clear()
-	buffer.Slice(0, 1024)
-	rand.Read(buffer.Value)
+	buffer.FillFullFrom(rand.Reader, 1024)
 
 	auth := NewSimpleAuthenticator()
 	b.SetBytes(int64(buffer.Len()))
diff --git a/transport/internet/kcp/segment_test.go b/transport/internet/kcp/segment_test.go
index c071cdb53..4fda45ff4 100644
--- a/transport/internet/kcp/segment_test.go
+++ b/transport/internet/kcp/segment_test.go
@@ -38,7 +38,7 @@ func TestDataSegment(t *testing.T) {
 	assert.Uint32(seg2.Timestamp).Equals(seg.Timestamp)
 	assert.Uint32(seg2.SendingNext).Equals(seg.SendingNext)
 	assert.Uint32(seg2.Number).Equals(seg.Number)
-	assert.Bytes(seg2.Data.Value).Equals(seg.Data.Value)
+	assert.Bytes(seg2.Data.Bytes()).Equals(seg.Data.Bytes())
 }
 
 func TestACKSegment(t *testing.T) {
diff --git a/transport/internet/udp/hub.go b/transport/internet/udp/hub.go
index 2a1783779..9b125e6a2 100644
--- a/transport/internet/udp/hub.go
+++ b/transport/internet/udp/hub.go
@@ -136,7 +136,7 @@ func (v *UDPHub) start() {
 	oobBytes := make([]byte, 256)
 	for v.Running() {
 		buffer := alloc.NewSmallBuffer()
-		nBytes, noob, _, addr, err := ReadUDPMsg(v.conn, buffer.Value, oobBytes)
+		nBytes, noob, _, addr, err := ReadUDPMsg(v.conn, buffer.Bytes(), oobBytes)
 		if err != nil {
 			log.Info("UDP|Hub: Failed to read UDP msg: ", err)
 			buffer.Release()