Make a statement while making your commute. The Canfield B is weather resistant, durable and sleek, making it perfect for anywhere your day might take you. The roll top design enables a wide-mouth opening, complete with a zip and a magnetic hold and so you can fill this bag to the brim worry-free. A secure and innovative closing feature, secret wallet pocket, and chunky zip come together to create a secure and trendy backpack. No matter the length of the commute, the weather outside, or how many belongings you’re toting, the Canfield B is the ideal travel accessory. Medium If your laptop or tablet is a bit larger than the Medium Canfield B is perfect for you. With enough space for a 17" laptop, you'll be able to take everything you need anywhere you go. This size has two side water bottle pockets. Each medium bag is 42cm x 30cm x 12cm. (model is 5'7" & wears a men's medium shirt.) What’s what? Roka take pride in their brand and products. Here’s a look at what this bag is truly made of. Outer material: weather resistant matte nylon (triple coated) Base material: weather resistant canvas (triple coated) Lining material: matte nylon Hardware: galvanised, smoked, branded metal Straps: cotton webbing All products are vegan. Details, details, details. Inside each Roka bag is a lightly padded laptop pocket, a small personal pocket, and padding to add comfort to the back when carried. Take care While Roka bags are washable, usually a simple wet sponge does the job. The materials used are designed to be durable and weather resistant. And the straps will become softer and more comfortable with each use.