28/01/2015: Unfortunately I have to revise my opinion / review - the boots are not waterproof. After they had for the first time at the right wintry weather in use, I unfortunately had to find that our son every time had wet feet and boots was durchgenässt.
That's a shame, because this is for me at children's winter shoes simple premise (and is also described as the seller)
So - not advise - a pity because the boot itself is very nice and well located!