The Brompton Borough Waterproof Roll Top Bag Large is the bag to choose when you want plenty of carrying capacity without losing the convenience that makes a Brompton so useful.
With 23 litres of space, there's room for considerably more than your everyday essentials. It's a great choice for commuting with a laptop and change of clothes, carrying some shopping home or packing for an overnight trip. The roll-top design also makes the space easy to use, while helping keep everything protected when the weather turns.
The tough TPU-coated nylon construction uses welded seams to create a properly waterproof bag, making this particularly well suited to year-round commuting and longer journeys where you can't always avoid the rain.Inside, there's a padded laptop sleeve to keep your computer separate from the rest of your kit. Two easy-access rear pockets provide useful storage for items you want close to hand, while adjustable external load straps give you another place to secure additional gear.
Like Brompton's other front luggage, the bag attaches directly to the Front Carrier Block rather than hanging from the handlebars. This puts the load onto the frame, helping the bike retain its familiar steering feel even when you're carrying more.
Once you're off the bike, simply release the bag from the carrier block and use the detachable shoulder strap or carry handle.
Key Features
- Large 23-litre capacity
- Fully waterproof construction
- Tough TPU-coated nylon outer
- RF welded seams
- Roll-top closure
- Internal padded laptop sleeve
- Two easy-access rear pockets
- Adjustable external load straps
- Detachable shoulder strap and carry handle
- Quick-release Front Carrier Block fitting
- Dimensions: 30 x 43 x 18 cm
- Compatible with A Line, C Line, P Line, T Line and G Line
Size and Capacity
With a 23-litre capacity, the Waterproof Roll Top Large sits at the spacious end of Brompton's front luggage range. At approximately 30 cm wide x 43 cm high x 18 cm deep, it provides enough room for a laptop, waterproofs, lunch, spare clothing and other everyday essentials without resorting to a backpack.
The generous capacity also makes it a good option for shopping, longer days out and lightweight overnight trips. The roll-top design gives you a practical main compartment that's easy to pack, while the external pockets and load straps help keep frequently used or awkwardly shaped items separate.