My son doesn't seem very comfortable in these and he REFUSES to walk or even stand up while wearing them.  I think they are uncomfortable.  Maybe too heavy/bulky for his age (he is almost 15 months).  He absolutely LOVES his Robeez booties, though, those are not good for outdoors.  I like the way these look and they seem pretty durable.  Definitely waterproof.  The interior is very silky soft and cozy feeling.  I would only consider buying them again for an older child, not for a beginning walker.