RSLSteeper Support Hallux Rigidus Insoles Features and benefits: Hallux Rigidus insoles are designed to treat painful extension at the first metatarsophalangeal joint. An ortholyn inner shell extends distally beyond the first metatarsophalangeal joint providing a responsive shock absorbing core whilst limiting painful extention motion. Choice of three arch profiles optimises the contouring to the foot. The low profile and durable construction facilitates use in a wide range of fotwear. Sizes outside of the chart below are available to order on request. Insole design allows use with various heel heights.