Nikolay Arch Booster size LargeFEATURES: Easily and quickly to put on the foot Invisible on the foot and does not hinder the dancer's movements Protects the foot from scratches caused by a contact with floor Made of contemporary materials, the silicone arch booster prevents from foot injury and skin irritation. After use wash the silicone arch booster in soapy warm water and dry gently. MATERIAL: silicone, flexible fabric SIZE: Large fits 38 39. 5 shoe