Glo-Wormsare 9cm light-reflective and glow-in-the-dark semi-rigid tubes that you simply push the guy rope through before pushing in the peg. They catch your eye and help prevent you tripping over your guy ropes. Glo-Worms also help prevent you walking into the tent in the dark and to find your tent in the dark. The darker it is the better as they emit a gentle green glow. They are 'charged' with daylight and glow through the night.Glo-Worms help avoid stubbing your toe on a tent peg.Each 'worm' is made from half highly reflective material (the same material is used on the jackets used by the emergency and roadside services) - and half Glow-in-the-Dark material which means that they can be seen in torch light AND in complete darkness. Their pale grey and pale green colour is also very visible during the day. While your sub-conscious seems to ignore the guy-rope itself - the sleeve at the bottom is seen out of the corner of your eye and you naturally avoid them.