How should a properly fitted harness feel?

A properly fitted harness should indeed be comfortable when in a sitting position after properly adjusting it. The purpose of the harness is to provide safety during flight, ensuring that the pilot is securely restrained while allowing for mobility and comfort during normal operations.

While it may feel somewhat uncomfortable when standing because the harness works to keep the pilot in place against the forces of acceleration and deceleration, once seated, the harness should allow for a snug fit without causing excessive pressure or restriction. This ensures the pilot can operate controls effectively while remaining safe and secure within the seat.

It’s critical for a pilot's harness to balance safety with comfort, given the various maneuvers and activities that occur during flight. A harness that feels loose when standing may not provide adequate safety if abrupt movements or g-forces occur, while a tight and restrictive harness may hinder movement and impede the pilot’s ability to maneuver effectively.