Size: S, M, L, XL feature: 1. Correct Posture: The Airbag Foot Drop Bracket can provide comfortable support to lift the soles of your feet and improve your walking posture. 2. Soft Air Cell: The foot drop orthosis adopts inflatable air cell cushion, which is more comfortable to wear and fits your feet perfectly. 3. Maintain balance: The foot drop orthopedic brace can maintain the balance of biological force lines and effectively correct ankle varus or valgus. 4. Easy to wear: The foot drop orthosis is lightweight and can easily fit into multiple pairs of shoes for your daily use. 5. Convenient buckle: Both sides of the double-sided buckle can be opened, easy to wear, very suitable for patients with hemiplegia. packing list:1 x Foot Drop Orthosis2 spacers2 x round carabiners5 x Bar Shackles1 x air pump how to use:1. Put the orthosis into the shoe, pay attention to distinguish the left and right feet.2. Put the affected foot into the shoe and adjust the position of the orthosis (do not squeeze the foot, do not squeeze the foot).3. Grab the deadbolt and insert it into the buckle, hearing a click confirms that the buckle is secure.4. Tear off the velcro, fasten the strap after fastening, be careful not to be too loose or too tight.