Protection against dry particulates and water based light liquid sprays and splashes. Good for use in industrial manufacturing, paper industry, food processing and for heavy dust environments. Features: Encased 3/8" elastic at opening . 2 snaps for adjustment inside back of shoe cover line.Flexible synthetic rubber-coated polyester sole.100% Polyester Specs: Reusable Shoe Covers- Launder before wearing in an ISO Cleanroom-MTO customization available Construction: Low-Lint Case Quantity: 60 Case Length: 40 Case Width: 32 Case Height: 60