The Gul Response 4/3mm Back Zip Wetsuit in Ultra Violet & Tie DyeProduct Information:• Product Code: RE1277S21-UVTI• Blindstitched seam construction.• X-Flex 150% Super Stretch in the main body.• FX:Lite silky smooth hydrophobic layer.• Thermospan core central heating system.• 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 waterproofing.• Mesh on the chest and back to guard against wind chill.• Titanium 2 reflects heat back in.• Non-petroleum based neoprene.