Restrap is a British brand of bike luggage focused on bikepacking. Its bags attach with straps to the saddle, frame, handlebars, or forks, without racks or screws. The idea is to distribute the load on the bike rather than on the back, freeing the cyclist on long rides.
The brand gained recognition for its straps, and this is still evident in its quick-release buckles and exposed stitching. It is more aimed at self-sufficient bike travel than the daily commute. A waterproof bike bag often takes the form of a bag with a roll-top closure, which tightens more with each turn as the bag is less full.
Each location on the bike has its constraints. Fork bags strap onto the eyelets of a gravel bike fork and carry heavy, compact gear. The saddle bag takes on soft volume but can sway if it is overloaded. The frame bag utilises the front triangle and lowers the centre of gravity, provided it allows water bottles through.
On a road bike without a rack, the saddle bag and frame bag replace everything. For a night outside, aim for three distributed load points instead. Before buying, measure the setback between the saddle and the tyre, and the clearance under the saddle: these dimensions decide, not the stated volume.