Dimensions: 19.75" X 13.25" X 9.75" (50.2 Cm X 33.7 Cm X 24.8 Cm) Volume: 1709 In³ (28 Liters) Laptop Sleeve: 13.25" X 17.75" (33.7 Cm X 45 Cm) Fabric: 600D Polyester Toile, 500D Nylon Oxford Slub, 420D Nylon, 210D Cordura® Nylon Ripstop FelxVent™ suspension system Padded, fleece lined 15" laptop sleeve in main compartment Large main compartment Front compartment with internal orgainzation and extra padded tablet sleeve 360 Degree reflective bike light loop, water bottle tabls and shoulder strap webbing Two extended mesh water bottle pockets External fleece lined pockets Updated front elastic bungee Padded top handle Sternum strap with whistle buckle Benefits Easy access pockets Custom injected shoulder straps for all day comfort no matter how heavy the bag is Padded tablet and laptop sleeves protect electronics Mesh water bottle pockets can easily double as additional storage Extra fleece lined pocket is perfect for smart phones or sunglasses