Servus® CT 18821 is a 16", black PVC, steel toe knee boot. The 18821 feature an anti-skid sole and heel. These boots meet ANSI Z41 PT 99 Section 1 for Impact/75 & Compression/75 toe protection. Removable and washable foot form cushion insoles are also included for easy boot upkeep. The 18821 include reinforced construction at critical stress points and are100% waterproof.