Big Agnes Copper Spur UL1 Footprint

This footprint fits both the Big Agnes Copper Spur UL1 and the Copper Spur UL1 Bikepack, adding a waterproof layer under the tent floor and doubling as the ground sheet for a lightweight Fast Fly pitch. Being waterproof rather than just water-resistant makes it a solid barrier against ground moisture on damp pitches, which matters more on a solo one-person tent where you don't have much floor margin to spare. Used in Fast Fly mode without the inner tent, you lose the bug netting, so it's a fair-weather, low-insect setup rather than an all-conditions one.