Anti-arch orthosis made by Prim, indicated for use in people who need to be on the move for long periods of time. Suitable for men or women with equinus feet or some very pronounced elevation in the arch. It is used to balance the balance when walking. Restricts plantar activity to 90°. Provides greater stability in the leg, directing the flexo-extensive movements made by the foot. Orthopedic piece that provides flexibility in the dorsal flexion of the foot. Composed of homopolymer polypropylene and 20% injected talc. It consists of a piece that supports the sides of the leg, exposes the heel and covers the sole of the foot through an insole. It is fastened at the calf by means of an adjustable strap. Another band under the ankles prevents the orthosis from slipping during use.