Likewise - I have had mine for nearly 18 months and have 2 very messy little boys that spill everything on them and they just wipe clean. They do bead the water off but water will eventually soak through if there is enough of it, as in heaps!! (Not that they ever have with mine as drinks have stayed spilled on them for several hours).
They are wesuit material, but you don't get all hot and sweaty on hot days.
I can certainly recommend them!