These knee boots have a PVC upper that resists chemicals and is lighter than rubber. - Knee-height boots protect the foot, lower leg, and calf to just below the knee. - General use boots are worn when performing everyday tasks. Shoe Style / Knee Toe Type / Steel Footwear Application / Agriculture, Construction, Equestrian, Food Processing, Gas, General Purpose, Oil Gender / Men's Size / 9 Boot Color / Black Footwear Material / PVC Footwear Sole Pattern / Cleated Midsole Construction / Rigid Steel Boot Height Adjustment / Adjustable Height with Cut-Down Bands Electrical Hazard Rated / Yes Oil Resisting Sole / Yes Heel Style / Defined Heel Ninety Degree Heel / Yes Safety Criteria / Defined Heel, Electrical Hazard (EH), Oil-Resistant Sole, Steel Toe, Waterproof Waterproof / Yes Outsole Technology / TDT Self-cleaning Oil-Resistant Sole Technology / TDT Insole System / FootForm(TM) Insole Color / Gray/White Insole Material / Foam Removable Insole / Yes Boot Height / 14 in Heel Height / 1/2 in Footwear Closure / Pull-On Standards / ASTM F2413-18 ASTM Standards Met / Compression (C/75), Electrical Hazard (EH), Impact (I/75) Style Number / 18821 Series / Servus Features / PVC Polyblend Injection Molded Construction, CT (Comfort Technology) For Easy Flexing, Arch and Heel Support, Washable Insole, Heel Cup Reduces Heel Slippage Footwear Width / D Predominant Footwear Color / Black