Twelve or more plastic bottles are used to make the recycled (rPET) materials that make each bag, and all ROKA bags are vegan friendly too! Each Bantry has four straps for being carried on your back or by your side, with a front pocket closed by a sturdy zip, a secure inside pocket, as well as a laptop or tablet sleeve inside. Made using the rPET sustainable Nylon, the bag has a smooth and glossy feel. It is then coated to make it water-resistant and finally put through a softening process to make it have a softer feel. And the nylon material is weather-resistant, lightweight, and as durable as all the ROKA bags! The Bantry B medium bag is the best thing to have your back. With a padded compartment for your laptop or tablet and enough space for notebooks, water bottle, an extra sweater and more - this size is ideal for staying on the move. Each medium bag is 40cm x 30cm x 12cm. Capacity is 14.39 litres.