I dried one pair using the dryer and the other pair I let air dry. The only formal study of which Im aware was inconclusive and can be found on the innerfidelity web site by searching on "On the Measurement and Audibility of Headphone Break-in". Ive had some problems with the Bluetooth connection. Stilisticamente ottimo, anche se comprende solamente la capsula. Sound quality isn’t mind blowing, but it’s perfect for working out and calls. Im a big fan of calisthenics. By far one of the best request Ive used . It’s adorable. Also these have good batch support. We already tried that.