Orca Neo Thermal Swimming Cap in Black and Orange | 2021  The new Orca Neo Swim Cap uses 3mm 100% Neoprene for added warmth, comfort and durability. This thermal neoprene swim cap can be paired with your wetsuit for extra warmth in colder than usual waters. An adjustable chin piece provides a better fit and the increased warmth offered by covering your head allows you to stay in the water for longer. Features   Extra Warmth - 3mm thick neoprene. Comfort -  adjustable Velcro chin strap.