In the effort to continue making the best prefabricated orthotics possible, Comfortland has a redesigned polypropylene shell, making it one of the best on the market. With deeper heel cups and increased arch firmness, this medical-grade foot support is the foundation of the Comfortstep line, increasing shock absorption and improving both balance and stability. Indications: Over pronation Arch support General foot pain Features: Medical- grade polypropylene Deep heel cups Increased arch firmness Part # Size CS-900-A X-Small (M 3- 4.5, W 5- 6.5) CS-900-B Small (M 5- 6.5, W 7- 8.5) CS-900-C Medium (M 7- 8.5, W 9- 10.5) CS-900-D Large (M 9- 9.5, W 11- 11.5) CS-900-E X-Large (M 10- 10.5, W 12- 12.5) CS-900-F XX-Large (M 11- 13, W 13+)