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 Neoprene Heat-Tech Warmth Swim Cap offers fleece-lined insulation while maintaining optimal hydrodynamics through the water. 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.Product Information:• Product Code: NA21UHTC116-BLK• 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 variety of head sizes.• Increased warmth for your coldest open water swims.• Low drag hydrodynamic design