Tingley Flite Safety Toe Knee Boot with Safety-Loc Outsole is made from Aerex 1.5.5, a proprietary, chemical-resistant, thermally-insulative, microcellular polymer, resulting in boots that are over 40-percent lighter than most steel toe PVC and rubber knee boots. Lightweight upper, cushioned heel, slip-resistant nitrile rubber outsole and composite toe provide superior comfort and safety. Ideal Applications: Wide variety of Food Processing (Dairy, Meats, Vegetables, and Refrigerated/Frozen Foods), Farm/Ag, Chemical, and Petrochemical. Chemical Resistance: Superior chemical resistance to fats, oils, hydrocarbons, certain acids, and caustics makes Flite an excellent choice for food processing and petrochemical applications.