Whether competing individually or in groups, the Lifesystems Intensity Glow Marker comes into its own when the weather takes a turn for the worse. If organising a race at night, our markers will allow you to mark out the route to help participants. Alternatively, they can be attached to bags to help keep bigger groups together or used as a night light within your bivi or tent. Indeed, these markers have many advantages for outdoor use at night. Each marker comes supplied with a karabiner, adjustable strap for easy attachment.