O'Neill Wetsuits Mens 4/3 mm Mutant Full Suit with Hood Should fit snug, but not too tight Contortionist Seamless Shoulder Design for ease of entry Modular Closure System allows you to have a hood wetsuit or switch the hood out for a standard neck Now Updated with 100% UltraFlex DS Neoprene and Firewall on the inside for extra stretch and warmth Single Fluid Seam Weld Keeps water from entering at all seams and critical points Contortionist Seamless Shoulder Design for ease of entry Super Seal Cuffs, Krypto Knee Pads, External Key Pocket and The LSD Lumber Seamless Design