Thought it might just be a new shoe thing, but one shoe continues to leave marks. As you can see from the picture you need 16. Once I figure out more of the settings on that I know it will be great. After applying them from floor to ceiling on every wall in my 13 x 14 studio I have noticed the following results:1. I only would have wished for one screw hole on the bottom for hanging vertical. If you want a comfortable headset with good sound quality and you aren?t on Xbox get these. Cannot pair with Flip 4 for some reason i have been using it strictly for talking the voice quality is excellent. But the additional comfort is not worth hundreds of dollars, especially for lower sound quality. The fit was perfect and they are comfortable, if you are planning to wear them recliner surfing.