FLEXIBLE STORAGEOur 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 BUCKLEThe 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 openings.ROBUST MATERIALSThe roll-top travel backpack combines comfort and style with a long-lasting design. Made from highly-durable, waterproof fabric. Enhanced-strength zippers and buckle keep your items secure, while the breathable mesh s-curve shoulder straps and back panel provide comfort while carrying.HOLDS EcoFlow RIVER 2 Series Portable Power StationsSpace to comfortably store and carry RIVER 2, RIVER 2 Max, or RIVER 2 Pro. Features Compatibility RIVER 2, RIVER 2 Max, RIVER 2 Pro Brand compatibility EcoFlow Waterproof Yes Carrying strap Yes Produc