Supports and keeps the cold away from your lower back. 100% LP Nylon Neoprene. 3mm thickness. Great under wetsuits for extra warmth and support. Super good when you’re on your motorbike or in a kayak. Wear one as a safety measure for support if you are prone to back injuries or are recovering from one. Velcro closure (adjustable). XS = 60cm – 23″, S = 77cm – 30″, M = 90cm – 35″, L = 107cm – 42″. The adjustable velcro closure is 18cm – 7″ long so that allows approximately a 9cm adjustment in or out. Made in New Zealand