The large Brompton Borough roll top bag is highly water resistant and features an adjustable external load carry strap making for easy access to helmets or jackets, integrated water bottle sleeve and padded laptop section. Made with a tough textured Cordura fabric and stretch mesh for the expandable side pockets, the roll top Borough bag packs it all in, day in, day out. The large Borough bag is the perfect companion for commuting to work on your Brompton, or for taking your bike away to explore a new city.