Summer Infant sleep positioners are designed to keep baby sleeping on their back. Unique AirCare Foam™ is used in all of our sleep positioners, which has been independently tested by Bureau Veritas™ testing laboratories and demonstrated to be 7x more breathable then regular foams. In addition, Summer Infant’s sleep positioners use FloThru mesh over the AirCare Foam. The combination of AirCare Foam and FloThru fabrics promotes better air circulation to prevent baby from overheating, also thought to be contributing factor to SIDS. ..While back sleeping is indeed the safest sleep for baby, the incidence of Plagiocephaly (flat head syndrome) has in-creased. Summer Infant has incorporated the patent pending TOTS reminding systems into many of its sleep positioners to help prevent Plagiocephaly...Features:....Fully adjustable sleep positioner ......Inclined surface gently elevates baby to help reduce reflux & aid digestion ......Breathable wedges help reduce over heating ......Easy to use reminding system to show which direction to face baby’s head ......Easy to clean & machine washable