Guls' best-selling suit! The Response FX range is available in men's ladies and junior styles. Using Guls' 150% stretch neoprene and thermal linings this range of suits can really help your surfing style. Whether you prefer a chest zip for flexibility or back zip for easy entry Response FX delivers. The back zip version also features Guls UBS backup system to keep the water out. FEATURES REVO FIT: 3D pattern technology BLINDSTITCHED: Seam construction RS-FLEX: 150% Textured Superstretch over arms X-FLEX: 150% super stretch main body X-FLEX THERMAL: ultimate insulation & warmth G-TAPE: Inner waterproof X-Flex taping fuses seams together for additional reinforcement POWERTEX4: knees for flexibility & durability KEY POCKET: lower calf pocket with key loop ABS: aqua barrier chest entry PRO NECK: seam free neck seal PK: zip Non-petroleum based neoprene CONSTRUCTION BLINDSTITCH Panels are double glued and then butted together followed by stitching that does not penetrate all the way through the neoprene. Inside the wetsuit heat welded tape goes over the seams in high stress areas this further strengthens the seams. NEOPRENE X-FLEX 150% stretch neoprene is used in our high performance wetsuits. The latest X-FLEX neoprene is 10% lighter absorbs less water and has a softer more comfortable feel. X-FLEX THERMAL X-Flex Thermal- combines the performance of X-Flex neoprene with lightweight thermal insulating lining Thermospan.The benefits of combining these technologies create a 10% lighter wetsuit with increase thermal properties. Featured on the NEW Flexor III. POWERTEX Four way stretch high specification knee panels designed to resist the most harsh elements while providing maximum flexion and extension of the knee. THERMOSPAN Engineered by our scientists so that your core body temperature locks in the heat. By wicking away your body moisture the lightweight thermal insulation traps warm air all around you. Keeping your core body warm helping blood to pump around yourGul