This waterproof seatpost bike bag is a must-have for all cyclists. With its spacious 1.5 liter volume, there is more than enough storage space for everything necessary for the bike trip, such as patchwork and food.

The bag is designed with a bottle holder on the side, so that you can bring a bottle of water or other drinks for the trip.

The bicycle bag is made of high-quality materials, which make it both robust and waterproof. This means you can cycle through rain and snow with peace of mind as your belongings in the bag will be protected.

It is easy to mount on the bike's seatpost with a clamping mechanism, which also makes it easy to put on and take off.

The bag is perfect for both commuting and long bike rides, and its great design complements any bike.

So if you're looking for a good quality waterproof bike bag with bottle holder that has a capacity of 1.5 litres, then this bike bag is perfect for you.