This shoe is the most supportive Teva made. 4 / BW 1. I purchased these as my first pair of ANC headphones. LOVE the look and it provides extra space! When I try to pair it with a device, I set it to the pairing mode (blue light flashing rapidly) yet it doesnt appear on my device until I power the speaker off. Very surprising for a well known company. Could not even get my foot into it. Now, because I want to stay honest and correct, as I am in this review, I will not return and ask for a refund for these 2 pairs of sleepers because I already washed them and wore one pair for 10 min. I will exchange them, but the problem is that I don?t know if I have to change them for a smaller size or I was sent the wrong size. Completely adequate for use with my stationary bike.