CT™ Economy Knee Boots, Steel Toe, Size 8, 16 in H, PVC, Black ORS NASCO non hardening sealant No 3 Aviation is non hardening sealant No 3 Aviation is a slow drying liquid that changes to a pliable Boomerang nose seal is adjustable for secure fit and added comfort Color coded for quick size identification Latex free PVC injection molded footwear is 100% waterproof to ensure workers' feet are dry and comfortable PVC formulation is resistant to degradation from agricultural chemicals fertilizers and animal waste Flexible and durable upper allows for ease in movement for greater work comfort Removable FOOT FORM™ contour cushion insoles provide all day comfort and support Reinforced construction at critical stress points provides a durable and long wearing boot