Carry tools and other small essentials in the M-wave® triangle frame bag. This small, zip-closed bag fits within the triangle of your bike, and its sleek profile prevents interference with your legs. It attaches with hook-and-loop closure, and it closes with a zipper.
Seems to work just great. Make sure you don't have brake wires going along the top of the frame as the straps velcro around it. It could be a bit bigger too. Overall pleased.