If Mary Poppins had to cycle in a Dublin winter, this is the bag she'd want. With loads of compartments, completely removable straps, and a unique adjustable mechanism for clipping onto any bike, this roll-top backpack is useful, comfortable, and stylish. The bag comes with different straps, meaning it can be worn as a backpack or a messenger bag, or carried by the top handle. It has a maximum capacity of 25L, split into different pockets and compartments. We especially love that the padded laptop sleeve is removable - making it easier and safer to bring your laptop from home into work or college.  We love that the bag is weatherproof, and has a water-proof finish. The adjustable roll-top closing mechanism provides extra security and adaptability.  Our favourite feature has to be the adjustable hooks at the back, making it easy to secure the bag on to any bicycle luggage rack. what's it made ofMade from coated, durable and water-repellent recycled cotton  how does it comeas is, 45 X 30 X 13cm