The neon orange warmth cap offers great thermal protection and visibility when in the water. Made from 2.5mm Super-Stretch material, the cap provides warmth while maintaining good hydrodynamics through the water. Anyone who has experienced ‘brain-freeze’ when swimming in cold water will know how valuable triathlon skull caps can be to get you going! The design is focused on making this cap the best fit possible and has a Velcro strap which joins under the chin to cater for different head sizes. We have found the biggest complaint from swimmers who use the one-piece caps is that they can feel ‘tight’ under the chin and have no adjustability. This design, therefore, helps to alleviate this problem. Key features Velcro strap under chin to accommodate different head sizes compared to one-piece alternatives. Allows more comfort to be achieved underchin. Offers High-Visibility in the water Neoprene Swim Caps Size Chart Size Head Circumference S < 21in M 21in - 22in L 22in + Size Head Circumference     S < 55cm    M 55cm - 57cm     L 57cm +