As per the recommendation here a couple months ago, I got some Mickey govt surplus boots off ebay... $45 a pair.. My boys latched on to 'em-they leave their Muck's sit.. Proper amount of movement for snowmobiling-a few weeks ago when sledding up at Wisc, helping dig a sled out of the water, filled 'em up with water-no problem, didn't even bother.. Just dumped the water out that night.. Go again the next day, as insulation doesn't get wet...
   If they fit a little loose, you can pump 'em up through the air spigot to fit tighter..different size feet can then use them...Can get them in white, as well as black, too....       fashion statement, anyone??