MSR Night Glow Zipper Pulls

Good product, even used one as a zipper pull on my motorcycle jacket after the zip broke. Small, lightweight but sturdy.

These are a little expensive on the one hand, but overall worth the money. The significantly reduce the faff time of trying to open up a tent in the dark, but are also good for use on bivy bag zips (which can be a particular faff to use in the pitch black). Depending on how tidy you are as well, I've found them to be good for attaching to emergency items you'd want to find quickly in the dark, such as a headtorch. Could also attach to guy lines, but I reckon it's better to just use reflective cord for those (MSR and Nightize cords seem to be the best).