In sunny, snow-covered conditions, some facsimile of arctic sunglasses can prevent snow blindness and keep you on the move. This makeshift eyewear borrows heavily from the traditional eye protection worn by Arctic peoples. The narrow slits restrict the amount of damaging UV light that your eyes receive from sunlight bouncing off the snow, and it’s enough protection to prevent snow blindness. Simply measure around your head (where a blindfold would go), peel off a strip of duct tape twice as long, and fold it in half lengthwise so the sticky side meets. Leave a small bit of adhesive exposed at the end to fasten the goggles together. Set the tape against a hard surface (like ice), cut two narrow slits for your eye holes, and you’re done. And in the absence of other protection like a mask or SPF, you can also use tape on your nose and cheeks to prevent sunburn and offer good protection from windburn and minor protection from frostbite.