Soft, large, crystal-clear PVC frame that fully encloses the face. Special side grooves allow for wearing over prescription glasses. Available with a wide nylon elastic band, a neoprene strap for good chemical resistance and easy cleaning, or a special helmet attachment compatible with the 3M G3000 safety helmet. Scratch-resistant lens coating and anti-fog coating are available for most models in the product line. Can be worn with prescription glasses. Transparent interchangeable film for the lenses provides additional abrasion protection. This model has been specifically designed for use with prescription glasses, dust masks, or half masks for respiratory protection. Indirect ventilation prevents fogging as well as the entry of liquids and dust (the non-ventilated version also offers protection against gas and smoke).