The Canfield B was designed for the active life! This roll-top backpack is perfect for every day! The Canfield B features a flap opening creating additional storage and zipper protection. This bag also has two side pockets for bottles, four straps for easy transport, a secret pocket on the back, two secure pockets inside and a padded sleeve for a laptop or tablet. Made from rPET nylon, which gives it a smooth and shiny feel, it is then coated to make it water and weather resistant; then it goes through a softening process to give it a softer feel. Inside each ROKA bag is a lightly padded laptop or tablet pocket, a small personal pocket and padding to add back comfort when carrying. How to take care of it ? Although ROKA bags are washable, a simple damp sponge usually does the trick. The materials used are designed to be durable and weather resistant. The straps will become softer and more comfortable with use.