Red Army Airsoft reports about the Stich Frame Weight Distribution System that is designed to help reduced the stress of the load on your back and relieve your back... "Stich Frame was not designed for airsoft players, but for members of the special forces who have to wear personal protective equipment for a long time, that is, armor in body armor and covers for plates The Stich Frame frame weight distribution system from Stitch Profi can be installed on any old and new body armor and combat belts from Stich Profi, as well as on most body armor and combat belts from third-party manufacturers."