The Gul Response Back Zip 4/3mm Wetsuit in Black has everything you could want in a wetsuit. It's long lasting, durable and flexible. It combines being good value for money and good performance. Made with glued and blindstitched seams in addition to 100% X-Flex super stretch neoprene. Product Information: Product Code: RE1246S20-BLACK Blindstitched seam construction. X-Flex: 150% super stretch main body. FX Lite: Smooth and hydrophobic material on back panel to provide wind chill protection. S-Lock: Easy entry back zip system. PK Blackout waterproof zip. Powertex4 knees for flexibility and durability. Revo Fit: 3D pattern technology. G-Tape: Inner waterproof X-Flex taping fuses seams together for additional reinforcement. Mesh on chest and back to prevent wind chill. Titanium 2 reflects heat back in. Non-petroleum based neoprene.