No break in period whatsoever. I bought a size bigger aGreat quality, very comfortable, but I recommend you get a half size or a whole size larger because they run small. nike air force 1 happy face I had misplaced an older pair of Sennheiser earbuds. 5, got a 10 since there’s no back), and it fit fine. nike air force 1 happy face VERY STURDY! nike air force 1 happy face Flexible and comfortable for my son. 1st one bought for Christmas didnt work. They are flexible and super adjustable which meant they fit really well on his larger head. nike air force 1 happy face The quality of the workmanship and materials used is excellent, so I expect them to last a long time. I also use the bar soap and body cream and do not develop any rashes from any of the products.
nike air force 1 happy face