Gossamer Gear Polycryo

The Polycryo is an ultralight tent footprint made from PolyEarthylene, a biodegradable, biobased polyolefin film rather than a coated nylon or polyester fabric typical of most footprints. At 168 g for a 183 x 244 cm sheet, it's dramatically lighter than most tent-specific footprints, trading long-term durability for weight savings — this is a consumable accessory meant to be replaced periodically rather than a lifetime piece of gear. Its main jobs are protecting a tent floor from abrasion and ground moisture, and because the film is clear, you can lay it out and spot sharp rocks or roots underneath before pitching your shelter on top. It's listed as universally compatible rather than tied to a specific tent model, so sizing it to your shelter's floor dimensions is worth checking before buying. For anyone running an ultralight tarp or trekking-pole shelter without a bathtub floor, or wanting to extend the life of a thin tent floor, the Polycryo adds negligible weight for real floor protection.