OUTDOOR RAIN FLY: Built for downpours and rugged conditions, the Outdoor Rain Fly is a waterproof backpack rain cover designed to protect your gear from rain, snow, and the unexpected, wherever the trail takes you. FULL COVERAGE, WEATHERPROOF DESIGN: Made from 100% recycled Terra Shell 50D ripstop nylon with a 2,000mm hydrostatic coating and fully taped seams, this rain fly keeps water out even in extreme conditions. SECURE FIT AND DRAINAGE: A cinchable elastic cord ensures a snug fit over your hiking backpack. Laser-cut drainage holes at the bottom release trapped moisture, preventing pooling inside the backpack cover. PACKABLE AND VERSATILE: Stuffs down into a breathable mesh pouch with zipper closure and hanging loop for quick drying. Ideal for air travel or wet treks. Available in two sizes: fits 25-30L or 45L backpacks. RADICAL PRODUCTS, RADICAL COMPANY: Peak Design creates industry-shifting, lifetime-lasting gear with a mission to leave the world better than we found it. No investors, no venture capital – just innovation on our terms. When wet weather rolls in, the Peak Design Outdoor Rain Fly has your backpack covered – literally. This waterproof backpack rain cover is constructed from durable 100% recycled Terra Shell 50D ripstop nylon with a 2,000mm hydrostatic coating and fully taped seams to keep your gear bone dry. Designed for all-weather hiking and travel, it cinches tight with an elastic perimeter cord for a secure fit on 45L bags. Smart laser-cut drainage holes at the bottom release any water that sneaks in. When the storm clears, the rain fly packs down into its own zippable mesh pouch that clips or hangs on the outside of your pack to dry.