If you feel like you're carrying half of your belongings with you at all times, this Aerialist 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. • Made from 100% polyester • Fabric weight: 9.56 oz/yd² (325 g/m²), 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