Holds it's shape and not bulky wide, quality feeling material. See how it goes with salt dripping on the zipper for hours on end ha ha

Purchased a month ago and used for the first time on a long gravel ride and it stood up to the test really well. Great quality item and plenty of room for spares, tools, food and phone. Great frame strap coverings which prevented any frame scratches even though it was being bounced around on rough terrain. Held itself in position very nicely throughout the ride with stiff sides and bottom. Very convenient position for quick access to everything.