I spoke with BOSE this morning and someone speaking broken chinese told me ". I ended up walking with curled toes to keep them on my feet. There is also only 3 different silicon eartips. Love small Case. I took them to Europe and walked everywhere over every kind of wet or dry ground/cobbles/stone for three weeks. They are easy to use and fit well on all the appropriate free weights I use at the gym. The padding on top of the head area is equally thick as well. Have practically no waist (49/45/49) but it was pretty forgiving. These K712s have noticeably better extension, with a fuller response, and much more emphasis. I almost didn?t want to say how good they were because I didn?t want a sell out.