A fast, permanent solution to worn or broken sliders or a zipper that keeps separating. Simple to install with an adjustable thumbscrew that allows one side of the slider to separate from the other ('upper' and 'lower') so it can be positioned anywhere along a zipper chain to replace a missing or damaged slider.
Medium (size 5-8) fits most packs, tents, sleeping bags and light jackets. Large (size 8-10) for riding suits, jackets and pants.
Aerostich wrist, pocket and vent zippers (#5) use the medium size FixnZip. Main zippers (#8 and #10) use the large size. Cheap, practical, carryable insurance on all-day and long-trip rides. (Murphy's law, zipper corollary #1: carry one or both sizes in the bottom of one of your suit or jacket pockets and you'll never break a zipper for the rest of your life.) Single zips, specify Medium or Large.