NEW 2010 SEASON MUTANT 5/3mm WETSUIT: Maximum Versatility and High-Performance MaterialsO'Neill's patent-pending Modular Closure system makes the men's Mutant 5/3mm wetsuit the most versatile wetsuit in their line. Now with UltraFlex XDS neoprene technology, the Mutant is more flexible and lighter than ever before.Body: 70% UltraFlex DS, 30% FluidFlexChest/Lumbar: Smooth Skin/Firewall X-typeModular Closure: UltraFlex DDS with D-foamKnee: Kevlar with D-foamNeck Facing: GlideskinSide Hood: Smooth SkinStrategic Seamless Paddle ZonesLSD: Lumbar Seamless Design Sidewinder S-Curve Seams