The transparent fabric acts as a light diffuser: put your headlamp inside the bag and hang it from the ceiling of your tent. While in your backpack, the pouch protects your headlamp's lens from scratches, and prevents the headband from getting tangled with other gear. Guaranteed compatible models: Petzl Tikkid, Bindi, Tikkina, Tikka, Tikka Core, Actik, Actik Core and Swift RL. Note! If you use the bag with other headlamps, make sure that your lamp does not get too hot - some modern LED headlamps get dangerously hot with higher light output settings.