BIG AGNES Copper Spur UL1 Bikepack Footprint 2026BIG AGNES Copper Spur UL1 Bikepack Footprint is compatible with Copper Spur HV UL1 Bikepack tents featuring Tiplok Tent Buckles. Extended footprint creates a vestibule floor for dry, dirt free changing and additional gear storage. 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