Protruding parts can catch on switches in the cockpit. Insist on headsets with a smooth, no-protrusions profile. Noise canceling in microphones is critical. Cockpit and radio communication is not compromised by ambient noise. Even breathing noises are eliminated.
Wide cushions spread the compression load more comfortably.
Boom positioning is highly intuitive. Length, height and angle should all be independently adjustable. Switching between speech and stand-by positions should be fast and convenient. All Peltor aviation products have a three year limited warranty.