STM Bags DP-0914-1 Medium Evolution Backpack,Fits up to 15 Inch Screens, Graphite-Black 35 Litre capacity - fits most laptops with screens up to 15 inch -concealed laptop section Rain cover tucked in at the base Multi pocket organiser section-comfortable harness and backpack straps Phone pocket on shoulder strap-sternum strap and tuck in waist strap Elastic straps on front for sweater etc-2 versatile side pockets for newspaper bottle or umbrella