Type II MIL-SPEC abrasion and corrosion-resistant anodized aircraft aluminum construction with unbreakable, scratch-resistant polycarbonate lens Ultra compact design fits in the palm of your hand, comfortably fits in your pocket Type II mil spec abrasion and corrosion resistant anodized aircraft aluminum construction with unbreakable, scratch resistant polycarbonate lens Removable pocket clip also clips onto brim of hat for hands free use