Zipped Mesh-pocket on back panel (store shoulder & waist straps when on the bike) Note: US-20 is too large to retro-fit to any of our backpacks. US-20 has removable waist and shoulder straps. Store the straps in the back mesh pocket when using the pack on the bike. The waist strap connects to the female buckles tucked away in the corners of the rear mesh-pocket. The US-20 can also be worn like a courier pack. 100% waterproof tail pack. * 20 litre capacity * DryPack – 100% waterproof construction * Includes fitting straps * Ultra tough construction * 10 year guarantee See image for fitting instructions. Fitting traditional style luggage to the new generation of sports bikes has become increasingly difficult. Underseat pipes and minimal bodywork dictate a new solution. Both the US10 and US20 fit to the seat-pad, with no extra bungee-cords. 100% waterproof construction on the main pack body and the packs can fold down when empty to store under the bike seat. The US-20 is also an effective way of adding storage to luggage racks and aluminium panniers. The Universal System allows you to build up to a 40 litre tailpack , by adding US-10’s to the top or sides of the US-20.(US-5 also fits) This modular approach allows the user to choose between size of storage based on type of journey.