This is a backpack cover made using Tyvek Silver. It covers the backpack by cinching with a cord through a loop, with dimensions of 80cm wide and 110cm long. The cover wraps around the backpack by tightening the cord. The loops for the cord are sewn with a sewing machine. Loops made of Tyvek are attached to both sides, allowing you to attach a carabiner or thin rope to the backpack to prevent it from being blown away in strong winds. The color and shape of the cord and cord stopper may vary. A storage bag (14cm x 15cm) is attached to the main body, so you won't lose the bag. The backpack in the reference photo is 36cm wide and 77cm tall, filled with contents. Weight: 79g The red backpack cover in the reference photo is a commercially available one for 30-45L backpacks. The last reference photo shows water being repelled. The Tyvek logo, etc., will be printed on one side. The design and color may vary. Although unused, wrinkles and creases are present due to the nature of Tyvek. The material is highly water-resistant, but please note that it is not completely waterproof. Carabiners and backpacks, etc., are not included as photo props. Only the backpack cover is for sale. This is handmade, not by a manufacturer, so please refrain from purchasing if you are looking for perfection. ★Tyvek® Silver is a sheet made by vapor-depositing aluminum onto high-density polyethylene non-woven fabric Tyvek®, and further applying an anti-oxidation resin coating to each fiber to prevent aluminum degradation. Unlike other companies' products that simply sandwich a breathable aluminum layer between thin waterproof films, this is a robust building material that maintains its waterproof performance even after long-term use. From the Asahi-DuPont Flashspun Products Co., Ltd. HP Thank you for your consideration. Function: Lightweight Material: Tyvek Size: 30-45L