The most frequent negative comment we hear about neoprene caps in general relates to the strap under the chin. Zone3 have done what we can to combat this with our standard cap, by adding an adjustable Velcro strap. However, we wanted to take this to the next level and produce a cap with no strap at all. The strapless neoprene cap has been carefully designed to ensure an optimum size and fit that does not slip off the head easily. An added Smoothskin closure system gives extra grip around the inside rim of the cap to grip against the head. Included with each order is a free white silicone swim cap that can be worn over the top of the neoprene cap. Key Features: Strap free design. Free white silicone swimming cap designed to help hold the neoprene cap in place. High quality 4mm Yamamoto Smoothskin. Key Benefits: Increased comfort. Warm hydrodynamic design.