The material seams quite thin and I fear if I kept anything sharp in that pocket it would rip. However, I have noticed that my posture IS slightly improved, which can give the impression of a size change. It won’t give audio warning when battery is low. This gives the headphones an overall clean presentation, in fact, the sound signature mimics a live jazz performance. ANC works extremely well, and cancels most of the external ambient noise. Now they just have to last a few months and they will be a great deal. But I had hoped this might have a trapezoidial profile so that it would stay in the slot on its own but it is simply square. Difficult to find ghillies for Irish dance in a toddler size 10. I like the option for different sizes. Its a shame because I did like the style!