Damaged 2 mtn bikes when they fell over in this rack! I played around with this feature and determined that there is a big "jump" in NC at a little more than the halfway mark. I didnt realize these run small. The next day I was in so much pain in my feet and legs that I had to take ibuprofen to get thru the day. Because of my swelling I also wish the strap had a little more give to it, but its still manageable for me. To sum it up, the general idea of this headphone is a combination of the clarity of the HD700/800 (not that different) with no roll-off highs and clean sound across the board. The shoes strings don?t stay tied very well so u have to always double knot. These look incredible and have a far better, sturdier feel than the Solo 3s. I love them so much that I order more for my daughters to use on their headphones. Really dont know if all this is that I was sold a refurbished one as if it were new, but I bought through that seller because he/she was backed by Amazon.