L.H.
hi D.,
WE use a feather topper over our mattress and our pillows are feather too, I believe it is personal preference. Down is feathers also, they make down alternative for people who are sensitive or have allergies.I couldn't say on the back, side, or stomach, pillows. But I do know that I was I your same situation waking up in the morning aching due to an old mattress set- we invested in the sleep number bed and a feather topper and I love them both! Good Luck with your bedroom makeover.