Vango helium1 footprint smoke the helium 1 footprint is designed to protect the tent groundsheet from stones thorns or other items which may cause damage shaped to the size of each tent in the vango trekking range the footprint is an invaluable addition to extend the life of your tent in addition the locking clips secure the footprint to each tent ensuring the groundsheet stays perfectly clean more info durable 70 denier nylon for expedition tents protects built in groundsheet f