Hard to get the buttons positioned  just right on your head
Everybody has a different size head diameter and their ears are  positioned differently.  I let my nurse sister try this out in the ER where she has to wear a mask during her entire 12 hr shift.  She said this band most definitely takes some of the pressure off the back  of her ears but she ended up remodeling it by removing the buttons and placing them in a better spot for her head.  This is not a design flaw, it is simply that everyone has slightly different dimensions and when you are trying to take the pressure  off the back  off your ears with mask straps you may need to tweak the buttons a bit.  All in all, I recommend.
Rating: 4 stars