WATERFLY Sling Backpack Bag Water Resistant Crossbody Backpack Casual Daypack Men Women Hiking Travelling Working Large Capacity: This sling bag comes with 18L large capacity, including a main pouch and a front zipper pocket, while there are 5 compartments and 2 pen storage bags in the main pouch, the largest compartment is compatible with 13.5 MacBook Air Water Resistant Material: Made of water resistant nylon material outside, the casual chest bag is durable and great to protect the inside items from raindrops, sweat and moist Breathable Back Pad: Equipped with breathable mesh pads in the back contact surface and shoulder strap, this daypack is super breathable and comfortable to wear throughout all day even in hot summer Adjustable Reversible Shoulder Strap: Designed with 4 D-rings on the lower part, the adjustable shoulder strap can be connected with the left or right D-ring for your preference, so that it is convenient to wear on your left or right shoulder Widely Used: This lightweight casual bag can work as a sling bag, chest bag, crossbody bag and travel bag and keep your hands free for hiking, travelling, cycling, working, daily use, etc. The main pouch is ideal for umbrella, water bottle, Kindle, charger, small notebooks, books and other things. The notebook compartment in the main pouch can hold a 13.3&#034; MacBook Air. The other 3 small compartments in the main pouch are ideal for phone, wallet, bank cards, passport, etc., you can rest assured it is safe. 2 small pen storage packs are compact for pen keeping. Front zipper pocket is compatible with keys, lighter, cigarettes, tissues, lipsticks and other quick-accessed small items. Size: 9.8 x 4.3 x 14.6 inches / 25 x 11 x 37cm Strap Length Range: 30-41.3 inches / 66-105cm Weight: 450g / 1.0lb. Adjustable removable shoulder strap fits for both left and right shoulder wearing.