This side sleeper firm support Pillow is deep filled for extra neck and shoulder support. The special deep box wall construction provides neck and shoulder support right to the edge of the Pillow. Ideal if you prefer to sleep on your side or prefer a slightly fuller Pillow, and fits a standard pillowcase. All our synthetic pillows and duvets are non allergenic, which means there\'s nothing in them that could cause allergic reactions. Which is great for peace of mind and essential of allergy sufferers.