Size adjuster kit in expanded polyethylene for KS-1 PRO. Includes two flanks and one back part. 6mm thick. Inner fabric in washable Lycra, external side with velcro for attachment to the antishock layer of KS-1 PRO. This adjuster kit can replace the standard kit (3 mm) to increase comfort whenever the strap adjusters are not enough to guarantee the best adhesion to the body. Sizes: S, M, M wide, L, L wide, XL, XL wide.