Surewerx S71911 Safety Glass Sealed To Protect Eyes XPS502 Sealed Safety Glasses Features flexible, soft temples that are permanently attached to the frame using a heavy-duty ratcheting (up or down) temple adjustment hinge Allows the user to adjust temples for maximum comfort and protection Includes a cloth strap that conveniently attaches to the temples Detachable strap can be easily removed/re-attached as desired Ballistic Rated – meets US Military standard MIL-PRF-31013 requirement