High quality breathable neoprene material retains heat and prevents skin irritation; Elastic Spandex removes excess perspiration and allows the skin to breathe and SBR Pad release shock with comfort and stablizer during lifeCross straps stabilizes the ankle to restrict plantar flexion and guides the talocrural joint and Achillis tendon to proper motionOpen heel design allows a wide range of motions during activity and still provide support for the ankle tendons and jointsAvailable in two size (S fits for little kid US 12-4 shoe size; M fits for big kid US 5-8 shoe size); The ankle support comes with adjustable straps which allow to meet different requirements and ankle diameters. Ideal for baseball, volleyball, basketball, soccer, ice hockey, tennis, skiing, mountain climbers, skiing, dancing, training and so onIdeal support for post-surgery recovery from ankle sprain, ligaments overstretching, tendon pain analgesic, and general protection against acute and chronic ankle straing caused by high intensity exercises