O\'Neill Psycho Tech 6/4+mm Hooded Winter Wetsuit 2021 All new and improved for winter 2021 the O\'Neill Psycho Tech 6/4mm features the Technobutter 3 neoprene on the suit for incredible flexibility and warmth. The body is 6.5mm and the arms and shoulders are 4.5mm thus you get the warmest suit without limiting the flexibility. The wetsuit now has stitch less seam technology which meaning no water ingress through the seams again making the suit even warmer. Along with the all new fully taped TB3X inner taping to keep the suit as flexible as possible. The all new O\'Neill Psycho Tech really is all about superior warmth as it also has thermal Air-Firewall lining which retains your body heat for longer keeping you warm in the water even in the coldest of UK winters. So if you are looking for a suit to ensure you stay warm, comfortable and flexible then it is certainly worth considering the Psycho Tech 6/4mm hooded wetsuit. FEATURES - Fuze Closure (Chest Zip Entry System) - Redzone Water Resistant Zip (Preventing Water Entry) - 360 Degree Barrier With Drain Holes ( Keeping The Cold Water Out Of The Wetsuit) - Fluid Seam Weld Stitchless Seam Technology - Fully Taped TB3X Seams - Arms / Shoulders / Shins / Calf Technobutter 3 Neoprene (Incredible Flexibility) - Chest / Back Technobutter 3 Air-Firewall Smoothskin - Thigh / Butt Technobutter 3 Firewall