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4 in 1 Memory Foam Pillow The 4 in 1 Memory Foam Pillow has multipurpose and multi-position features are especially designed to pad the strategic curves of your body. The memory foam pillow 4 in 1 practically sells itself because it relieves back pain, promotes right sitting posture, improves circulation, in knees and feet, and gives spinal alignment. Use this pillow for your lower back while sitting for long periods in the office or virtually anywhere. Place the 4 in 1 Memory Foam Pillow under your knees to ease lower back strain and leg pain or place between your knees for correct sleeping posture and spinal alignment. The 4 in 1 Memory Foam pillow also makes and excellent cervical roll and aids in relieving neck pain. It's perfect for propping your feet up and relaxing to help ease leg muscle cramps and tired feet.