Product Description SPECIFICATIONS Dimensions: Capacity: Around 50 L Weight: 3.3 KG (7.28 lb) Maximum laptop size: 20" 25.5 x 14.5 x 9.84 inches(60*37*25cm) FEATURES "Plus" :LARGE WHEEL: import, Add a built-in Kettle and supply convenitent and practical, more strong than old style.MAXIMUM:VERSATILITY: 4 different ways to carry it: Backpack for casual hands-free carrying, Smooth-Rolling for effortless travel, Haul Handle for low-profile short trips, Top of Carry On Bag for quick trips through the airportSUPERIOR SAVING TIME & POWER: mobility and maneuverability courtesy of Aoking's signature large, space saving, tough-terrain wheels.EFFICIENCY: We need what we need when we need it. So we designed separate individual quick-access pockets for a laptop, a tablet, a smart phone, a water bottle, and desk toolsSECURITY & DETAILS: Reflector makes you visible, travelling safely at night. Detachable keyring let you without ever misplacing your keys again and open every door conveniently. Interior Insulation Bag to keep your drinks all day well TO COMPUS & HIKING WITH FRIENDS TO TRAVEL WITH WORKMATE TO SCHOOL WITH CLASSMATE Largr capcity EFFICIENCY: We need what we need when we need it. So we designed separate individual quick-access pockets for a laptop, a tablet, a smart phone, a water bottle, and desk tools Wraterproof SUPERIOR SAVING TIME & POWER: mobility and maneuverability courtesy of Aoking's signature large, space saving, tough-terrain wheels. Big Wheeled "Plus" LARGE WHEEL: import, Add a built-in Kettle and supply convenitent and practical.more strong than old style. AOKING 20/22 Water Resistant Rolling Wheeled Backpack Laptop Compartment Bag Size 22inch/20inch