Copper Spur UL1 Bikepack FootprintDescription The Big Agnes Copper Spur UL1 Bikepack Footprint is a custom groundsheet designed specifically for the Copper Spur UL1 Bikepack tent. It adds an extra protective barrier between the tent floor and the ground, helping extend the life of the tent by reducing abrasion from rocks, roots, and rough terrain. Made from lightweight yet durable waterproof fabric, the footprint attaches directly to the tents pole structure using the integrated