These leather shoe inserts have been X1 hardened, a brand new method that results in a very rigid material that’s able to flex where needed yet provide firm support. The inserts are custom built for the wearer. The build process is detailed here. Due to special requirements to build each piece, please reach out via the Contact link to discuss ordering. (Note- these are intended to make footwear more comfortable and are not offered to cure, treat, or prevent any illness, injury, condition, or disease. User assumes all risk for use.)