The Clevamama Memory Foam Back to Sleep Positioner allows you and your child to have a comfortable night?s sleep. The Elevated Sleep Positioner with adjustable side bumpers aids Colic, Reflux, Nasal Congestion and Digestion. It reduces pressure on the cranium of baby by 50% and increases support by 80% helping prevent Flat Head Syndrome. Designed to keep your baby?s body fully supported while in the crib or cot. Engineered with fabric with airflows to draw away moisture and increase air flow. Waterproof and Machine Washable. Suitable from 0 to 6 months.