Bose X does not represent value for money, IMHO. The ear cushion fall apart in a year or two and replacement ear cushions are far more expensive than say, David Clark's. Until recently the wire is straight rather than spring coiled so if you lean back against the seat you can pull out the wire from the control module box. The adjustable headband has a small cushion at the top. This falls out after a few hours of use. The wind screen on the mic boom rots and falls apart after a year or two.
If you have kids using the headsets, they are not robust, ie the tripots cup can swivel 360 degrees and the wire will fall apart when this happens. However, the Bose X is very, very good when they work.
Just my experience after 7 years of use.