This large backpack can fit just about anything you need, with 2 zip pockets, a small slip pocket, a laptop sleeve, and 2 exterior side pockets.  
Waterproof exterior
Adjustable padded shoulder straps
Mesh back panel
Interior, exterior slip pockets
Padded labtop sleeve (fits up to 16")
100% Polyester
12"W x 18"H x 5.5"D