Sneaking Suits were special military wear created with electronic weaving technology using optical fibers. By clinging tightly to the wearer's body, the protective suit could boost resilience and strength, acting as armor and extra muscle tissue to perform such effects. It was designed to mirror the anatomy of a motor system and muscle tissue to enhance the users strength and overall performance, even when the user was greatly weakened. Recent models also came with a variety of sensors, shield the body from toxins, and interface with nanomachines, among many other features. Sneaking Suits were worn by Solid Snake and other FOXHOUND members during stealth missions.