The worlds first spacewalk without a seat belt, in 1984On February 3, two astronauts aboard the U.S. space shuttle Challenger completed the process with the help of a backpack unit (MMU), also known as a spacecraft and engine.In fact, it is the smallest backpack in the universe. Students use this type of backpack to support childrens space dreams and expand their scientific development.Place of Origin: China (Mainland)Material composition: 1Gender: Unisex Type: BackpackClosingType: ZipperItem Type: Soft Main Material: NylonA place of origin: NC (production area)Guangdong projectType: Backpack LargeSize: 30*17*46cm 650gPackage Includes: 1* Kids Backpack; operating systemThank you for stopping by. Backpacks are in stock. We will ship the order as soon as it is placed.Since this is an international package, the arrival time is around 15-25 days or earlier.