The Neoprene Heat Belt/Abdominal Binder is die cut from 1/8" thick neoprene which has a soft lining laminated to both sides. The VelcroTM closure provides an adjustable fit while remaining reliably secure. Neoprene retains body heat which can be therapeutic for pain and can help speed targeted weight lose. The low profile design makes this item concealable under most clothing. This and all Alpha Medical"s items come with a 100% satisfaction guarantee. Size Guide Size Small 26"-32" 66cm-81cm Medium 32"-38" 81cm-97cm Large 38"-44" 97cm-112cm X-Large 44"-50" 112cm-127cm