Just strap her on and go. The Sport Ankle ID is constructed of comfortable and flexible neoprene. We designed her to stand the test of time - but not interfere with your natural physical movement. Like all our IDs, the Sport Ankle ID can be laser engraved with your emergency contact information. The closure system is Velcro and is fully adjustable so that one size fits all (fits ankles up to 11.5"). It comes standard with a 3M reflective stripe to enhance your visibility when training in the dark. The Sport Ankle ID is available in 4 colors and both Original and Interactive versions.