KleenGuard* chemical A20 breathable particle protection boot covers are designed to move with you - and your employees - while helping protect against hazardous and non-hazardous dust. These protective garments offer superior particle holdout coupled with unmatched comfort attributes. The A20 fabric is comprised of five-layers of stacked barrier protection (SMMMS) against hazardous particles. This boot covers feature serged seams, an elastic opening and seamless sole. They are 13\" tall and have a seamless sole (one size fits all). They are a popular choice for dusty environments such as laboratories and remediation, as well as pesticide applications. KleenGuard™ Boot Cover, Series: A20, Fits Shoe Size: Universal, White, 13 in Height, Elastic Closure, SMS Fabric Outsole, Resists: Slip, Specifications Met: ASTM D5034, D737, E96, NEPA 99