The adult half leg LimbO provides reliable waterproof protection from the foot to just above the knee, fitting snugly around the lower thigh. The M80 is our standard size adult half leg LimbO suitable for most adults with average size legs. Please check the LimbO measuring guide for exact sizing advice. The strong triple layer cast sleeve is light and easy to put on, with its soft neoprene seal stretching over your cast (or dressing) to get in position. The seal is non-constrictive providing a safe and comfortable fit for patients with sensitive legs. The waterproof cast cover is a durable, reusable waterproof solution that will provide a long-term solution to the problem and difficulty of bathing with an adult leg cast.