The Canfield Sustainable is weather resistant, durable, sleek, and made from a recycled nylon material which gives the bag the same smooth feel and look as our non sustainable bags. 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. Each medium bag is 42cm x 30cm x 12cm. Capacity is 15 litres. The medium size can hold a 15” laptop Each Larg Bag is Size: 46cm x 38cm x 15cm. Capacity: 26 litres. The large size can hold a 17” laptop A secret back panel pocket along with two zip pockets inside and a laptop sleeve inside means you'll be able to stay organized and stay on the go! Outer material: weather-resistant matte recycled nylon, giving a smooth feel (triple coated) Base material: weather resistant canvas (triple coated) Lining material: matte recycled nylon Hardware: galvanised, smoked, branded metal. Straps: cotton webbing