diff --git a/src/main/java/ru/serega6531/packmate/service/optimization/tls/TlsPacket.java b/src/main/java/ru/serega6531/packmate/service/optimization/tls/TlsPacket.java
index 3b8bd7a..217a46c 100644
--- a/src/main/java/ru/serega6531/packmate/service/optimization/tls/TlsPacket.java
+++ b/src/main/java/ru/serega6531/packmate/service/optimization/tls/TlsPacket.java
@@ -78,6 +78,13 @@ public class TlsPacket extends AbstractPacket {
 
     public static final class TlsHeader extends AbstractHeader {
 
+        /*
+        0x0 - Content Type
+        0x1 - Version
+        0x3 - Length
+        0x5 - Record content
+         */
+
         private static final int CONTENT_TYPE_OFFSET = 0;
         private static final int VERSION_OFFSET = CONTENT_TYPE_OFFSET + BYTE_SIZE_IN_BYTES;
         private static final int LENGTH_OFFSET = VERSION_OFFSET + SHORT_SIZE_IN_BYTES;
diff --git a/src/main/java/ru/serega6531/packmate/service/optimization/tls/extensions/TlsExtension.java b/src/main/java/ru/serega6531/packmate/service/optimization/tls/extensions/TlsExtension.java
index d260da8..eb0bade 100644
--- a/src/main/java/ru/serega6531/packmate/service/optimization/tls/extensions/TlsExtension.java
+++ b/src/main/java/ru/serega6531/packmate/service/optimization/tls/extensions/TlsExtension.java
@@ -6,6 +6,13 @@ import ru.serega6531.packmate.service.optimization.tls.numbers.ExtensionType;
 
 public abstract class TlsExtension {
 
+    /*
+    0x0        - Type
+    0x2        - Length
+    0x4        - Content
+    0x4+length - End
+     */
+
     protected ExtensionType type;
     protected short extensionLength;
 
diff --git a/src/main/java/ru/serega6531/packmate/service/optimization/tls/records/ApplicationDataRecord.java b/src/main/java/ru/serega6531/packmate/service/optimization/tls/records/ApplicationDataRecord.java
index b8e7285..3403038 100644
--- a/src/main/java/ru/serega6531/packmate/service/optimization/tls/records/ApplicationDataRecord.java
+++ b/src/main/java/ru/serega6531/packmate/service/optimization/tls/records/ApplicationDataRecord.java
@@ -2,7 +2,12 @@ package ru.serega6531.packmate.service.optimization.tls.records;
 
 import org.pcap4j.util.ByteArrays;
 
-public class ApplicationDataRecord extends TlsRecord {
+public class ApplicationDataRecord implements TlsRecord {
+
+    /**
+     * 0x0          - Encrypted Application Data
+     * 0x0 + length - End
+     */
 
     private byte[] data;
 
diff --git a/src/main/java/ru/serega6531/packmate/service/optimization/tls/records/ChangeCipherSpecRecord.java b/src/main/java/ru/serega6531/packmate/service/optimization/tls/records/ChangeCipherSpecRecord.java
index ceb9962..f5147ae 100644
--- a/src/main/java/ru/serega6531/packmate/service/optimization/tls/records/ChangeCipherSpecRecord.java
+++ b/src/main/java/ru/serega6531/packmate/service/optimization/tls/records/ChangeCipherSpecRecord.java
@@ -2,7 +2,12 @@ package ru.serega6531.packmate.service.optimization.tls.records;
 
 import org.pcap4j.util.ByteArrays;
 
-public class ChangeCipherSpecRecord extends TlsRecord {
+public class ChangeCipherSpecRecord implements TlsRecord {
+
+    /*
+    0x0 - Change Cipher Spec Message
+    0x1 - End
+     */
 
     private byte changeCipherSpecMessage;
 
diff --git a/src/main/java/ru/serega6531/packmate/service/optimization/tls/records/HandshakeRecord.java b/src/main/java/ru/serega6531/packmate/service/optimization/tls/records/HandshakeRecord.java
index f219115..6cb742e 100644
--- a/src/main/java/ru/serega6531/packmate/service/optimization/tls/records/HandshakeRecord.java
+++ b/src/main/java/ru/serega6531/packmate/service/optimization/tls/records/HandshakeRecord.java
@@ -10,7 +10,14 @@ import ru.serega6531.packmate.utils.BytesUtils;
 
 import static org.pcap4j.util.ByteArrays.BYTE_SIZE_IN_BYTES;
 
-public class HandshakeRecord extends TlsRecord {
+public class HandshakeRecord implements TlsRecord {
+
+    /*
+    0x0 - Handshake type
+    0x1 - Handshake length
+    0x4 - Handshake version
+    0x6 - Handshake content
+     */
 
     private static final int HANDSHAKE_TYPE_OFFSET = 0;
     private static final int LENGTH_OFFSET = HANDSHAKE_TYPE_OFFSET + BYTE_SIZE_IN_BYTES;
diff --git a/src/main/java/ru/serega6531/packmate/service/optimization/tls/records/TlsRecord.java b/src/main/java/ru/serega6531/packmate/service/optimization/tls/records/TlsRecord.java
index fe95968..dac0f68 100644
--- a/src/main/java/ru/serega6531/packmate/service/optimization/tls/records/TlsRecord.java
+++ b/src/main/java/ru/serega6531/packmate/service/optimization/tls/records/TlsRecord.java
@@ -2,6 +2,6 @@ package ru.serega6531.packmate.service.optimization.tls.records;
 
 import java.io.Serializable;
 
-public class TlsRecord implements Serializable {
+public interface TlsRecord extends Serializable {
 
 }
diff --git a/src/main/java/ru/serega6531/packmate/service/optimization/tls/records/handshakes/ClientHelloHandshakeRecordContent.java b/src/main/java/ru/serega6531/packmate/service/optimization/tls/records/handshakes/ClientHelloHandshakeRecordContent.java
index 518c807..b642e5c 100644
--- a/src/main/java/ru/serega6531/packmate/service/optimization/tls/records/handshakes/ClientHelloHandshakeRecordContent.java
+++ b/src/main/java/ru/serega6531/packmate/service/optimization/tls/records/handshakes/ClientHelloHandshakeRecordContent.java
@@ -12,6 +12,19 @@ import static org.pcap4j.util.ByteArrays.SHORT_SIZE_IN_BYTES;
 
 public class ClientHelloHandshakeRecordContent extends HelloHandshakeRecordContent {
 
+    /*
+    0x0                  - Client random
+    0x20                 - Session id length (sidl)
+    0x21                 - Session id
+    0x21+sidl            - Cipher suites length (csl)
+    0x23+sidl            - Cipher suite 1..(csl/2)
+    0x23+sidl+csl        - Compression methods length (cml)
+    0x24+sidl+csl        - Compression method 1..cml
+    0x24+sidl+csl+cml    - Extensions Length (el)
+    0x26+sidl+csl+cml    - Extension 1..N
+    0x26+sidl+csl+cml+el - End
+     */
+
     private static final int CIPHER_SUITES_LENGTH_OFFSET = HelloHandshakeRecordContent.SESSION_ID_OFFSET;  // + sessionIdLength
     private static final int CIPHER_SUITE_OFFSET =
             CIPHER_SUITES_LENGTH_OFFSET + SHORT_SIZE_IN_BYTES; // + sessionIdLength + SHORT_SIZE_IN_BYTES*i
diff --git a/src/main/java/ru/serega6531/packmate/service/optimization/tls/records/handshakes/ServerHelloHandshakeRecordContent.java b/src/main/java/ru/serega6531/packmate/service/optimization/tls/records/handshakes/ServerHelloHandshakeRecordContent.java
index 09ef273..dfd9382 100644
--- a/src/main/java/ru/serega6531/packmate/service/optimization/tls/records/handshakes/ServerHelloHandshakeRecordContent.java
+++ b/src/main/java/ru/serega6531/packmate/service/optimization/tls/records/handshakes/ServerHelloHandshakeRecordContent.java
@@ -9,6 +9,17 @@ import static org.pcap4j.util.ByteArrays.SHORT_SIZE_IN_BYTES;
 
 public class ServerHelloHandshakeRecordContent extends HelloHandshakeRecordContent {
 
+    /*
+    0x0          - Server random
+    0x20         - Session id length (sidl)
+    0x21         - Session id
+    0x21+si      - Cipher suite
+    0x23+sidl    - Compression method
+    0x24+sidl    - Extensions Length (el)
+    0x26+sidl    - Extension 1..N
+    0x26+sidl+el - End
+     */
+
     private static final int CIPHER_SUITE_OFFSET = HelloHandshakeRecordContent.SESSION_ID_OFFSET;  // + sessionIdLength
     private static final int COMPRESSION_METHOD_OFFSET = CIPHER_SUITE_OFFSET + SHORT_SIZE_IN_BYTES;  // + sessionIdLength
     private static final int EXTENSIONS_LENGTH_OFFSET = COMPRESSION_METHOD_OFFSET + BYTE_SIZE_IN_BYTES;  // + sessionIdLength
diff --git a/src/main/java/ru/serega6531/packmate/service/optimization/tls/records/handshakes/UnknownRecordContent.java b/src/main/java/ru/serega6531/packmate/service/optimization/tls/records/handshakes/UnknownRecordContent.java
index 848aeab..bf93d55 100644
--- a/src/main/java/ru/serega6531/packmate/service/optimization/tls/records/handshakes/UnknownRecordContent.java
+++ b/src/main/java/ru/serega6531/packmate/service/optimization/tls/records/handshakes/UnknownRecordContent.java
@@ -4,6 +4,11 @@ import org.pcap4j.util.ByteArrays;
 
 public class UnknownRecordContent implements HandshakeRecordContent {
 
+    /**
+     * 0x0          - Content
+     * 0x0 + length - End
+     */
+
     private byte[] content;
 
     public static UnknownRecordContent newInstance(byte[] rawData, int offset, int length) {