Value, durability, style and comfort. Tingley Pulsar PVC Knee Boots feature a Calf Relief Expansion (CRE) gusset that expands up to 1.5 inches for more calf comfort. 15-Inch Height knee boots are formulated with a high-performance outsole and a unique PVC blended upper resulting in a boot with good abrasion and slip resistance and excellent comfort and value. The composite safety toe meets or exceeds ASTM F2413 M/I/C and does not transfer cold or set off metal detectors. Ideal Applications: Poultry Husbandry and Processing, Farm and Barn, Agricultural, Municipal, and other Light Industrial applications. Chemical Resistance: Fats, oils, acids, alkalies, and many other chemicals. Tingley is ISO 9001 Certified.