Trianglebag Merida on frame is ideal if you have not enough space for your cycling accessories or just want to take something out without stopping. It mounts firmly to a frame betweent seat and top tubes with 3 velcro straps, so it won't fall while cycling.
Velcro fitting straps
Size: 27.3 cm x 5.7 cm x 21 cm
Make sure your frame is suitable for this type of bag