Model 89904 ONGUARD Polyblend PVC Flex 3 knee boots combine a polyblend PVC compound with nitrile for superior resistance to fats, oils and chemicals and provide 100 percent waterproof protection. The unique dual-compound Power-Lug outsole offers excellent wear resistance, slip resistance and cushioning for improved traction and comfort. Boots include a removable air-cushion insole for added comfort, a steel shank for firm arch support and kick-off lugs for easy removal. Suited to industrial and utility use including oil rigs, refineries, food processing, dairies, breweries, lawn care and general industrial applications.