The Heat Tech Neoprene Swim Cap from Zone 3 keeps you head warm in cold open water. If you have ever experienced 'brain-freeze' when swimming in cold water will know how valuable this swimming cap will be to your kit bag. This cap features a fleece-lined insulation while maintaining optimal hydrodynamics on the outer. The adjustable chin strap offers the perfect fit, keeping you comfortable on the move. Anyone who has experienced ‘brain-freeze’ when swimming in cold water will know how valuable triathlon skull caps can be to get you going! Our Neoprene Heat-Tech Warmth Swim Cap offers fleece-lined insulation while maintaining optimal hydrodynamics through the water. Our 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: Heat-tech lining for increased thermal properties Velcro strap under chin. High quality 4mm Yamamoto Smoothskin material. Part of a neoprene accessory range designed for year round training. Accommodates a wide.