Size: S: Foot length: 19-22CM, M: Foot length: 22-25CM, L: Foot length: 25-28CM, XL: Foot length: 28CMFeatures:1. Correction posture: The airbag foot drop corrector can provide comfortable support, lift the sole of the foot, and improve walking posture.2. Soft airbag: The foot drop corrector uses an inflatable airbag cushion, which is more comfortable to wear and fits your feet perfectly.3. Keep balance: The foot drop corrector can maintain the balance of the biomechanical line and effectively correct the inversion or eversion of the ankle joint.4. Easy to wear: The foot drop corrector is lightweight and can be easily put into multiple pairs of shoes for daily use.5. Convenient buckle: Both sides of the double-sided buckle can be opened, which is easy to wear and very suitable for hemiplegic patients.How to use:1. Put the corrector into the shoe, paying attention to distinguish between the left and right feet.2. Place the affected foot in the shoe and adjust the position of the orthosis (be careful not to squeeze the foot).3. Grasp the lock and insert it into the buckle until you hear a click, indicating that it is fixed.4. Tear off the Velcro and tighten the strap after tightening, being careful not to make it too loose or too tight.