Nice build quality. Seems solidly waterproof. I wish they had more pictures of different sizes because it’s tough to gauge how it would looo on my bike but this bag fit well. Some rubber mounting straps would be nice too, since the Velcro can hook to your clothes sometimes and I’m sure over time these will get wet dirty and gross. Has a large pocket and a small pocket with zippers opening both ways. Luckily matches my bike but other colors would be cool too. Overall happy with my purchase. This is a nice alternative to more expensive bags like tailfin, but Osprey is a brand I trust and they’ve made a really nice product here.