The roll-top design enables a wide-mouth opening, complete with chunky zip and magnetic holders and so you roll it over to cover the zip or leave it unrolled if you need to fill this bag to the brim. There’s a secret pocket on the outside and more pockets inside for all your tech things, and the medium and large sizes feature side bottle pockets. No matter the length of the journey, the weather outside, or how many belongings you’re packing, the Canfield B is the ideal travel accessory, commuter bag, school bag, and super practical backpack. The Canfield comes in both Recycled Canvas and Recycled Nylon options. The Nylon has a shiny look and smooth feel, and the Canvas has a textured look and matte feel. See our Sustainability tab below for more information. The Canfield B is available in three sizes: small, medium and large Medium: If your laptop or tablet is a bit larger the Medium Canfield B is perfect for you. With enough space for a 15" laptop, you'll be able to take everything you need anywhere you go. This Medium size has two side water bottle pockets. Size: 42cm x 30cm x 12cm. Capacity: 15 litres.