O'Neill Wetsuits - O'Neill 3mm Squid Lid Wetsuit Hood - Black :: Men > Wetsuits. Firewall interior: Retains heat and helps with dry timeO'neill wetsuit hoodThickness: 3mmVisor: Protects your eyes from water and the sun100% UltraFlex DS neoprene: High-performance super-stretch neoprene with a durable outer skin that resists velcro pullsGlued & Blindstitched Seam Construction: Glued and blind stitched construction provides a waterproof seam Size: X-Large,Medium.