I reckon that DCs are trying a horrid experiment on changing the homo sapiens skull shape . I find then heavy and uncomfortable. Peltors are much more comfortable and better value. Most NS helicopter pilots use the Peltor and spend 800 hours a year in them.
However I now wear an Alpha helmet and I feel naked flying without it. Excellent noise attenuation, built in sun visor - no more messing around with sun glasses and added protection for those heavy landings!