Quiksilver Wetsuits - Quiksilver Cypher 7.5mm Round Toe Wetsuit Boots - Black :: Men > Wetsuits. Bio-Fleece Thermal Neoprene: Recycled PET and infused with bamboo charcoal.\n 20% more flexibilityEntry: Pull on with hook and loop velcro strapFit: Round toeThickness: 7.5mmMen's wetsuit bootsMaterial: 92% Nylon/Polyamide. 8% elastaneBeadlock ankle grippers: To help keep the leg of the wetsuit and top of\n the boot secure to avoid any flushDST (dual seal treatment): For added water resistance Size: UK 11.5,UK 9.5.