This 28l backpack. Made from hardwearing, water repellent oxford fabric in recycled polyester. It has an easily accessed top pocket. Spacious front compartment with inside zippered pocket and mesh organizing pockets. Adjustable chest strap. Feature: hardwearing oxford fabric and lining in recycled polyester. Comfortable padded shoulder straps and back panel with air mesh. Zippered main compartment with padded 15 inch laptop sleeve. Hydration system compatible with an opening for drinking tube at the top. Zippered front compartment with inside organizing pockets in mesh. Gender: unisex. Family: high coast. Material: 100% polyester. Lining: 100% polyester. Volume: 28 litre.weight: 750 g. Number of pockets: 7. Pockets: inside compartment, mesh pocket(s), outside stretch pocket(s), zippered inside pocket(s), zippered outside pocket(s). Detachable chest strap: yes. Hip belt: yes. Detachable hip belt: yes. Bottom opening: no.