Purchase the Skydex pad kit. It's about $112 or so. Well worth the upgrade. The PASGT is not a very comfortable helmet. The ACH/MICH with Oregon Aero or Skydex pads is much better.
Issue ACH padding is pretty poor too. Issue ACHs used to use Oregon Aero pads, but seems like the Army later went with some MSA brand pads, which feel like styrofoam, and tend to hurt my head after while.
USCav and other outlets sell the Skydex upgrade kit for PASGTs. Google it. :thumbsup: