The Active-Flex Neoprene Cap is designed to keep you warm and focused during your water-based pursuits. Featuring a combination of 3mm neoprene warmth with a secure hook-and-loop chin fastening for a snug fit. The glued and blind stitched seams create a watertight barrier, ensuring maximum comfort in cold water. Wear on your next swimming adventure._3mm Warm and Stretchy Neoprene: Delivers superior insulation and flexibilityHook-and-Loop Chin Fastening: Ensures a secure and adjustable fitWatertight Seams: Prevent water ingress, keeping you warm and comfortable