I use it and it helps. I'll even put it on while watching TV. I've had it ever since I made the mistake of getting a covid shot.
Bb
Never had Covid.
Yea, I put mine on about 6PM after getting cleaned up from the day. I have it on now.
I have a special back pack that is sold with my battery powered concentrator that I wear outside if I am doing something that requires little more effort.