The Syncro GBS is made from a 16% lighter neoprene called FN Lite Neoprene that increases warmth and decreases weight.  FN Lite Neoprene is combined with dry flight infrared heat thermal lining to conduct body heat and retain it over a longer period of time, it’s wicking properties expel water from the thermal lining making this the warmest, lightest quickest drying neoprene. Features: Back Zip Wetsuit Thickness: 5/4/3mm Triple glued & blind stitched (GBS) seams that reduce sew throughs & water entry to keep you warmer YKK™#10 Back Zip: Spend time in the water, not getting into a suit. Easy to get into and effortless to get out of. Ecto-Flex Knee pads: Durable, lightweight and flexible outer knee pads that protect you and your board We say: Don't forget to check out the size chart (to the left) before buying!