What Our Gearhead(R) Experts Are Saying:"The 403 Foil CZ GBS Fullsuit has been my go-to through the coldest stretch of the season and it has not let me down once. The 4/3mm thickness holds heat through long sessions in really cold water, and the Superflex neoprene keeps the suit moving with you rather than stiffening up the way some thicker suits do when temperatures drop."When the water gets cold enough that a 3/2mm just does not cut it anymore, the decision to paddle out comes down entirely to what you are wearing. The Billabong 403 Foil CZ GBS Fullsuit is the answer for those deep winter sessions when the cold is real, and the swell is too good to watch from the beach. The extra thickness of a 4/3mm suit can work against you if the construction does not account for mobility, but Superflex neoprene keeps the exterior stretchy and responsive even as the foam does the heavy lifting on warmth. That foam is built from a partially recycled blend of repurposed car tires and neoprene scraps, combining strong thermal retention with a high-stretch character that carries through every paddle and turn. GBS seam construction bonds the panels precisely to minimize water intrusion and keep the suit flexible right at the seams, where stiffness tends to creep in on lesser suits. Reinforced melco spot tape at high stress points extends the life of the suit through repeated cold water use, and the chest zip entry keeps the back panel clean and uninterrupted for the shoulder mobility that matters most when you are paddling hard into a set.