Ideal for brevet I would say because you put it in front and it fits everything you want to have quick access to (put-take out) easily because it is without a zipper, for example control card, pen, mobile phone, GoPro, money. It has a cover for waterproofing and mesh pockets on the right and left to put the bags of used gels, bars until you find a bin to throw them away. The material has elasticity, which means that if you press it, it can fit something more. As for the attachment to the frame, given its small size, the three Velcro straps it has are more than enough to keep it very stable - also the Velcro straps are long enough and you can, for example, put your reflective vest under the frame when you are not using it. Good! If it were a little cheaper, I would be happier!