Build-wise they seem almost identical to the 428s, with comfortable soft pads around the ears, a padded headband, and a slight angle to the ears to fit properly around the ears. Just for comparison these run perfectly, I have purchased a couple pairs of these garden clogs and they typically run narrow . I was not happy with this set as a gift so I ordered a second pair for comparison. She absolutely loved them and immediately wore them. Once they are fully charge they work, and they cancel noise great. It looks fabulous! Final Thought:Im someone who truly enjoys picking songs apart and focusing on analytical pieces. Stick to a regular plastic seat. I love how I can leave it on my counter or hang it on the wall. I have a QC25.