Constructed of nylon for dimensional stability and flexibility, the Flex-Cuf was designed to be a quick, temporary alternative to handcuffs. The unique Strength Barb System contained within the Flex-Cuf head makes them virtually pick-proof. It features a smooth inside surface, combined with rounded edges that help to minimize the chance of abrasion or tissue damage.table.productattributes, .productattributes td { border-bottom: 1px solid #ddd; border-collapse: collapse; padding: 2px; text-align: left; }