I looked all over for a snow boot for my four year old twins that was easy to get on and off.  Most of the ones with velcro closures are for babies and small toddlers only.  These are sturdy and comfortable and they can get them on and off themselves.  Almost all the others are open only at the top and my kids (and I) dislike stuffing their feet down into them.  The only problem was that I could not find one site that had 2 boots available in their size, so I had to buy one from one site and one from another.  And even then I had to get them different colors.  Snow really does not leak into the boot.  But it fits looser than the other type so in deep snow it might pull off the foot.  We usually are on the packed stuff so it doesn't matter.