The fact that these have a removable insole is a big plus. Its call quality is far below that of the Airpods Gen 2. The most important feature for me is that these clogs dont slip as I walk, theres none of that "slap-slap" sound with each step. I?m really glad I found it. This is by far the simplest, and by offsetting alternating hangers by about 6 inches, they fit pretty closely and come down fairly easily (its all relative though - on the floor or horizontal on the wall is easiest). Over the years, Ive owned multiple Sennheiser products, and they have all been quality pieces of equipment. From what I am now told Birkis are not the same as Birkenstock in the manufacture of the product. I was envisioning myself having to go to the hospital with cotton in my ear canal. it fits exactly to the spot I put it(main reason I use it). Heaven help me if I try to use them to get to the basement!