Bobster Tread . With Removable Foam You Can Wear With Or Without. Textured Rubber Nosepads And Temple Ends To Lightly Grip And Secure. Anti-fog Lenses To Keep Lens Clarity When Your Body Temperature Rises. Ansi Certified. Rx Eligible Specifications for Bobster Tread: Manufacturer: Bobster Application: Outdoor Size: One Size Age Group: Adults Gender: Unisex Frame Color: Matte Black Frame Material: Polycarbonate Lens Material: Polycarbonate