BIG AGNES Copper Spur UL1 Footprint 2026BIG AGNES Copper Spur UL1 Footprint Footprint helps protect the floor of the tent from abrasion, mud and water and extend the life of your tent floor. 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. MATERIAL: Proprietary HyperBead fabric technology; 30D nylon ripstop with 1500mm waterproof silicone and