This is the second pair of these boots that I have bought. The first pair were great and that's why when it came time to buy a new pair, I bought these again. I'm not sure what Under Armour did, but after three months the side zipper wouldn't stay up. Also, the Velcro strap to hold the zipper up came apart. I had to staple them back together just to get the zipper to stay up. I can't walk more then 50 feet without having to stop and zip my boot back up. Of course they worked just long enough to go past the return date to get a new pair. Thanks Amazon, you sold me junk that I can't return.