They stay in and they work
I got these for my so since he was going to go camping and could not take his C pap so I got him these  try...  Well they fit great and stayed in.  That is a must, he has pretty severe sleep apnea and these worked when he had no power.  I Highly recommend them for anyone who snores or uses a c pap to have on hand for power out or camping trips.
Rating: 5 stars