The Swede-O Trim Lok brace is 25% lighter than other standard ankle braces. This brace is made from nylon mesh material to provide airflow, which helps to keep the foot and ankle cool, dry, and comfortable. The built-in stainless steel spiral stays provide support to help prevent the ankle from rolling. The lightweight, low profile design fits comfortable in most shoes. A full elastic back is comfortable against the Achilles tendon and helps reduce irritation and potential for blistering. Backed by an industry leading 1 year warranty. Full elastic back is comfortable against the Achilles tendon and virtually eliminates the chance for blistering. Superior fit comes from Trim Lok's low bulk design and fits comfortably in your regular athletic shoe. Lighter: Trim Lok is made of a lightweight nylon mesh material, which is lighter than conventional materials.