Tingley 51254 Profile Safety Toe Knee Boot Our Profile® knee boot is formulated with high quality PVC resins and Frigiflex® low temperature additives. The result is a boot that has good abrasion resistance and excellent flexibility in cold temperatures. Ideal Applications: Farm and Barn, Agriculture and Industry, Municipalities, and many Food Processing applications. Chemical Resistance: Fats, certain acids, alkalies, hydrocarbons, and other chemicals.