Hey everybody. I'm Ellen here at etrailer.com and we're taking a quick look at the Thule rail hydration system. This is gonna be an eight liter capacity bag, but it is going to have a two and a half liter hydro pack. So that's how much water you're actually gonna be carrying in the hydro pack itself. But there's still enough room to stash some other stuff in here as well. It's a unisex bag so I'ma… see more >