Rain is a constant issue, especially on an island and the rolltop design helps with this issue. Making the Ulvo Rolltop 23L a real easy one to recommend to people in Britain or fishermen. Fjallraven have also doing a great job with the design which looks great and finished with the brands classic logo. The bag has also been made out of their new Bergshell material which is a 100% recycled nylon material which is waterproof and tough as anything. Easy to recommend! Fjallraven Ulvo Rolltop 23L Black 23L Roll-top Main Compartment, inside pocket, pen holders 15\" Laptop Sleeve Inside Zippered Front Pocket Two Side pouches Back panel and air mesh shoulder straps Chest Strap Front Bike Loop Lightly Coloured Lining Dimensions: 43 H x 26 W x 12 D cm Material: Bergshell 400D 100% Polyamide Description by Cameron