Developed by adventure medical kits exclusively for the pocket survival pak visible over 20 miles durable lexan polycarbonate mirror with mil spec retro reflective aiming aid allows you to see the signal in the sky for more accurate aiming aiming aid lets you use the mirror one handed minimizing muscle fatigue weight 032 oz size 3 tall x 2 wide ideal uses climbers backpackers hikers campers adventure racers backcountry skiers hunters