I do expect them to loosen some after I break them in. Only buy if you are handy and willing to upgrade the durability yourself. Does not change the sound isolation or profile in any noticeable way unlike other more expensive replacements. Unboxed easily. Save yourself aggravation and buy something else. Theres a line on the solution tank that comes connected to the foam blaster that tells you exactly how much shampoo and water to add. If there is a TF card installed, the unit will automatically continue playing music from the TF card. Already doesn?t work. But other than that, these earphones are nice, durable, and cancel out noise. I can say that the building materials are great, to be expected of a $130 Headset - at the time of this posting & purchase.