Zone3 Neoprene Headband in Black | 2021 The new Zone3 Neoprene Headband is adjustable and made from smoothskin neoprene. The headband is easy to wear and great to take the chill off on colder swims. It doesn’t offer the same warmth as a full neoprene cap but is quick to put on and fits securely under a swim cap without being too obvious. Made from a 2.5mm high quality Smoothskin neoprene with high stretch inner lining. Hook and Loop adjustability means that a great fit is available on a variety of head sizes.