Who wins?
Right side vs Arm under the pillow
Right side wins 76% to 24%. 15 more put them in the same row. From Sleep Positions Tier List. Pick a side.
wet_taco_8734 on Right side: no difference, sleep how you want
SoggyLlama on Arm under the pillow: the cool pillow side keeps it worth it
Sleep Positions Tier List: the full ranking