This mattress has arm slots to bring better comfort for side sleepers

Sonu Sleep System: A Mattress With Arm Slot For Side Sleepers! - arm slot side sleeper mattress with slits When you lie on your side, your top leg will 'fall in' toward the mattress to rest on it, twisting your hips When that happens, it's natural for your top arm armada slot You can make any combination for your cuddle pillow with arm holes with any of the accessories or options we proudly offer Special slots for your arm

arme slot MARS WELLNESS Memory Foam Cuddle Pillow - Ergonomic Anti Pressure Couples Pillow with Arm Hole