EcoFlow River 2 Series Bag[FLEXIBLE STORAGE] Our 30L travel backpack fits a 15. 6" laptop as well as all your essentials, including clothes, books, water bottles, and umbrellas. Expands to 42cm x 12cm x 32cm(16. 5 x 4. 7 x 12. 6 inches) and rolls down to 38 x 12 x 32cm(15 x 4. 7 x 12. 6 in). [ROLL TOP AND RELEASE BUCKLE] The backpack easily folds down to adjust the size and fastens with a sturdy buckle. Access items quickly and conveniently through the top or back zipper