I've got a Dainese pressure suit.
It's very comfortable with no seams or pressure points. I wear it with a compression Tee shirt top, ie skins, 2XU etc.
I've had one big get-off on a rocky track and the gear proved it's worth. The scars on the armour (and boots, knee guards, gloves, helmet) proved it's effectiveness.
The compression top is supposed to help with breathing and recovery but what it does do is help to keep me cool. I wear the pressure suit over the 2XU top with nothing else. This keeps me comfortable in 30+ degrees and humidity over 90% even when we are in stop-start type riding while setting tracks etc