Most earbuds I owned need a little of breaking in, but these earbuds have an excellent sound out of the box. just as described and delivery was quick Terrible customer service and product! The earphone housing is also built with low-quality plastic. &We hope our review is helpful to you! Seems very well made and came with screws and anchors for the wall. I dont know why this pair is disintegrating like a cheap knockoff brand, but this is not what I had come to expect from Adidas. It is not a how to but more of a "if I can do it you can too" which I love because I always want to encourage others too. I also like that the material is stretchy, so its comfortable to sleep in. I walked and danced all day/night with not an ounce of pain.