Protect the bottom of your tent and add add an extra waterproof layer with a tent footprint! 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. Compatible with the Copper Spur UL1 Bikepack, and the Copper Spur UL1. Features: - Compatible with Copper Spur UL1 Bikepack tents featuring Tiplok™ Tent Buckles - Also compatible with Copper Spur UL1 Tent - Fast Fly setup available - stake out your footprint, insert your tent poles into corners, drape your fly over the top, and buckle it in for an even lighter, smaller packing setup - Fully compatible with Copper Spur UL1 models made after 2020 - may be compatible with older models, without Fast Fly capability