Pillow Cube, but make it a mattress - #sidesleeper

this mattress has arm slots to bring better comfort for side sleepers My Ig Hashtags #mattress #arm #sidesleeper

this mattress has arm slots to bring better comfort for side sleepers Side Sleeper Pillow

arm slot side sleeper mattress with slits This mattress has arm slots to bring better comfort for side sleepers SONU Sleep System

arm slot mattress You can stick your arm inside the mattress slats, so it won't press your shoulder out of alignment, making this a one of the best mattresses for side sleepers