| This Caterpillar Nitrogen Composite Toe Boot P89961 in black features a this rugged work boot is an easy choice when slippery surfaces are a concern and a safety toe is a priority. nitrogen features the extreme slip resistance of our exclusive SRX outsole compound and a composite safety toe for high performance protection in the workplace., rugged leather uppers, nylon mesh lining, removable EVA sock liner, PVC outsole, composite safety toe, strobel + cement construction |