Big Agnes Copper Spur HV UL1 Footprint - To extend the life of your tent floor, we recommend using a Big Agnes footprint or ground cloth. The Big Agnes footprint also enables you to pitch a lightweight, Fast Fly shelter while leaving the tent body behind. The Fast Fly configuration requires the footprint, tent fly, poles, and stakes. Pitch with the Copper Spur HV UL tents Fast Fly Compatible Nylon Rip-stop 1200mm waterproof polyurethane coating