The Ankle: Active support is designed to be worn during activity to:The Active Support is made from a 3mm high density fabric ,(90% neoprene rubber, 10% nylon polyester), that is stiff without restricting the bodys natural movements.The unique shape ensures that the support remains fixed in position during activity, thus protecting the ankle from further injury and allowing for longer periods of activity without pain.Provide heavy duty support to the ankle.Reducing the risk of further injury.Bringing confidence to allow for longer periods of sustained exercise, without experiencing ankle pain.Getting back to fitness more quickly.One size fits all, 7.25" to 13.5" (18.4 cm to 34.2 cm). Circumference measured just above the ankle bone.