Its not meant to sustain a heavy load. I was always called me Jeb at work, because my beard poofed up like an amish man. Didnt pay off at all, trying to look cute! If a person could find better fitting tips then isolation could be greatly improved. if you thinking about it do it Worked perfect. Like other buyers, Ive purchased several pairs of Teva Mush (and Mush II) over the past years. The price is remarkable compared to Apples, but I have not used, so I have no frame of reference. Pretty terrible hardware. I noticed a few weeks ago on the Crocs website that they were having a sale on the Walu II and decided to check the price here on Amazon as well.