Don’t laugh: This is an “As Seen on TV” product. However, it’s so handy that you’ll want to carry it everywhere. The Flip an Zip repair kit ($13, flipanzip.com) replaces broken or missing zippers, from your belay puffy to the lid on your climbing pack. It works essentially as a vice, with a thumbscrew in the middle of the clamp to fasten the new slider on and replace the broken one. (Sliders sold separately.) At 1.5 oz., it’s a great tool to have for those “Oh, shit, my puffy zipper came off, and it’s 15˚ outside” moments.