Use it to carry cell phone and topeak alien tool kit & medications. Based on the measurements on the site, I thought it would be slightly larger than an existing one I have. Don't know how the manufacturer arrived at their measurements but it definitely is not as large as I thought it would be. That was disappointing. Overall am pleased, but because it's not as big as I expected, I'm downgrading it one star to 4 stars.
I needed a bit more room to stash my phone, nutrition, and car keys. This product fits the bill. While it does not break the bank it has nice construction and the two front Velcro straps are essential in keeping it from listing. It looks water proof, but rain will seep in if it's more that a passing shower.