The Weatherproof 45L Travel Rainfly from Peak Design is designed for use with your 45L Travel Backpack, where it will offer complete weatherproof protection from the elements. Constructed from 200D siliconised ripstop nylon, the Rainfly packs into an integrated carry pouch that can connect to exterior attachment points on the Travel Backpack 45L and stow neatly inside a magnetically sealed exterior sleeve. A one-handed cinch cord keeps the Rainfly tight, secure, and snug.