Zone3 Neoprene Swim Cap in Black/Sliver | 2021 The new Zone3 Neoprene has been designed for anyone who has experienced 'brain-freeze'when swimming in cold water will know how valuable triathlon skull caps can be to get you going! Zone3's premium Neoprene Skull Cap provides warmth while maintaining good hydrodynamics through the water Zone3 have found the biggest complaint from swimmers who use one-piece caps is that they can feel 'tight'under the chin and have no adjustability. The design is focused on making this cap the best fit possible, with a Velcro strap under the chin to cater for different head sizes. Features Velcro strap under chin. High quality 4mm Yamamoto Smoothskin material. High-Vis option available. Part of a neoprene accessory range designed for year round training. Benefits Accommodates a wide variety of head sizes. Increased comfort and warmth. Low drag hydrodynamic design.