Calvin Klein has really done it with these slides! Was agonizing over whether to get these or the bose QC35 but after going into a store and trying both out it was a no-brainer to go with the Sonys. He never goes anywhere without them! Contra:My daughter first had to get used to wearing these slippers. I have had this for a few months now. Noise-cancellation. Not worth the price ! Bought ONLY 10 days ago. Then you unplug the phone to get rid of it it crashes. Size 11 seems close to a size 10.