If you feel like you're carrying half of your belongings with you at all times, this backpack is for you! It has a spacious inside compartment (with a pocket for your laptop), and a hidden back pocket for safekeeping your most valuable items. ???????????????????????? PRODUCT FEATURES: ? Made from 100% polyester ? Fabric weight: 9.56 oz/yd (325 g/m), weight may vary by 5% ? Dimensions: 16.1? (41 cm) in height, 12.2? (31 cm) in width, and 5.5? (14 cm) in diameter ? Capacity: 5.3 gallons (20 l) ? Max weight: 44 lbs (20 kg) ? Water-resistant material ? Large inside pocket with a separate pocket for a 15” laptop, a hidden pocket with zipper on the back of the bag ? Top zipper has 2 sliders, and there are zipper pullers attached to each slider ? Silky lining, piped inside hems, and a soft mesh back ? Padded ergonomic bag straps from polyester with plastic strap regulators