Safe Sleep for Babies: What the Environment Should Look Like

The core safe sleep setup

Back to sleep, every time. Placing a baby on their back for sleep is the single most important safe sleep practice 1Ref 1Moon RY, Carlin RF, Hand I; AAP Task Force on Sudden Infant Death Syndrome and the AAP Committee on Fetus and Newborn (2022).Sleep-Related Infant Deaths: Updated 2022 Recommendations for Reducing Infant Deaths in the Sleep Environment.Core AAP 2022 safe sleep recommendations: back position, firm flat surface, room-sharing without bed-sharing, no soft objects, inclined surface limit of 10 degrees, swaddling transition at first roll. The 2022 AAP policy statement recommends always placing an infant on their back — every nap, every night, for the entire first year. Once a baby can roll both ways independently, they may find their own position — that is generally acceptable — but the baby should always be placed on their back to start.

A firm, flat surface. The sleep surface should not indent under the baby's weight. Firm mattresses specifically designed for cribs or bassinets meet this standard. Soft surfaces — sofa cushions, adult mattresses, memory foam, or a surface at any angle greater than 10 degrees — do not meet this standard 1Ref 1Moon RY, Carlin RF, Hand I; AAP Task Force on Sudden Infant Death Syndrome and the AAP Committee on Fetus and Newborn (2022).Sleep-Related Infant Deaths: Updated 2022 Recommendations for Reducing Infant Deaths in the Sleep Environment.Core AAP 2022 safe sleep recommendations: back position, firm flat surface, room-sharing without bed-sharing, no soft objects, inclined surface limit of 10 degrees, swaddling transition at first roll.

A bare sleep space. The safest crib or bassinet has a fitted sheet and nothing else: no pillows, no bumpers, no blankets, no loose bedding, no stuffed animals, no positioners or wedges. These items can obstruct a baby's airway during sleep.

What qualifies as a safe sleep surface

Safe sleep surfaces include: cribs, bassinets, and play yards (pack-n-plays) that meet current Consumer Product Safety Commission (CPSC) safety standards 1Ref 1Moon RY, Carlin RF, Hand I; AAP Task Force on Sudden Infant Death Syndrome and the AAP Committee on Fetus and Newborn (2022).Sleep-Related Infant Deaths: Updated 2022 Recommendations for Reducing Infant Deaths in the Sleep Environment.Core AAP 2022 safe sleep recommendations: back position, firm flat surface, room-sharing without bed-sharing, no soft objects, inclined surface limit of 10 degrees, swaddling transition at first roll2Ref 2American Academy of Pediatrics (2025).Safe Sleep.AAP's current safe sleep guidance page: firm flat CPSC-compliant surface, no positioners or wedges, monitors not recommended as safety devices. Second-hand or older equipment should be checked against current standards — drop-side cribs, for example, are no longer considered safe.

Surfaces that are not recommended for infant sleep include: adult beds, sofas, recliners, bouncers, swings, car seats outside a vehicle, and inclined sleepers. If a baby falls asleep in a bouncer or car seat, the guidance is to move them to a flat sleep surface as soon as it can be done safely.

Room-sharing without bed-sharing

The AAP recommends that babies sleep in the parents' room — but in their own separate sleep space — for at least the first 6 months, and ideally the first year 1Ref 1Moon RY, Carlin RF, Hand I; AAP Task Force on Sudden Infant Death Syndrome and the AAP Committee on Fetus and Newborn (2022).Sleep-Related Infant Deaths: Updated 2022 Recommendations for Reducing Infant Deaths in the Sleep Environment.Core AAP 2022 safe sleep recommendations: back position, firm flat surface, room-sharing without bed-sharing, no soft objects, inclined surface limit of 10 degrees, swaddling transition at first roll. Research suggests room-sharing (without bed-sharing) can reduce the risk of SIDS by as much as 50% 1Ref 1Moon RY, Carlin RF, Hand I; AAP Task Force on Sudden Infant Death Syndrome and the AAP Committee on Fetus and Newborn (2022).Sleep-Related Infant Deaths: Updated 2022 Recommendations for Reducing Infant Deaths in the Sleep Environment.Core AAP 2022 safe sleep recommendations: back position, firm flat surface, room-sharing without bed-sharing, no soft objects, inclined surface limit of 10 degrees, swaddling transition at first roll. It also makes nighttime feeding easier. The baby's crib or bassinet can be placed right next to the parents' bed; the important distinction is that the baby is on their own surface.

Swaddling — how to do it safely

Swaddling can help some babies sleep more comfortably in early weeks. Safe swaddling keeps the baby on their back and allows the hips to move (the legs should be able to bend up and out at the hips — tight swaddling of the legs straight down can contribute to hip dysplasia). Once a baby shows any sign of rolling — even a single roll — swaddling should stop, because a swaddled baby who rolls to their stomach cannot push up to protect their airway 1Ref 1Moon RY, Carlin RF, Hand I; AAP Task Force on Sudden Infant Death Syndrome and the AAP Committee on Fetus and Newborn (2022).Sleep-Related Infant Deaths: Updated 2022 Recommendations for Reducing Infant Deaths in the Sleep Environment.Core AAP 2022 safe sleep recommendations: back position, firm flat surface, room-sharing without bed-sharing, no soft objects, inclined surface limit of 10 degrees, swaddling transition at first roll. Many families transition to a wearable blanket (sleep sack) with free arms at that point.

Common questions about sleep positioners, inclined surfaces, and monitors

Positioners and wedges: No sleep positioner or wedge is recommended or approved for infant sleep 2Ref 2American Academy of Pediatrics (2025).Safe Sleep.AAP's current safe sleep guidance page: firm flat CPSC-compliant surface, no positioners or wedges, monitors not recommended as safety devices. They have been associated with infant deaths and do not meaningfully reduce reflux or other concerns.

Inclined sleepers: Inclined surfaces greater than 10 degrees are not recommended for infant sleep because a baby's head can fall forward and occlude the airway 1Ref 1Moon RY, Carlin RF, Hand I; AAP Task Force on Sudden Infant Death Syndrome and the AAP Committee on Fetus and Newborn (2022).Sleep-Related Infant Deaths: Updated 2022 Recommendations for Reducing Infant Deaths in the Sleep Environment.Core AAP 2022 safe sleep recommendations: back position, firm flat surface, room-sharing without bed-sharing, no soft objects, inclined surface limit of 10 degrees, swaddling transition at first roll. This applies to bouncers, rockers, and some car seat-style infant sleepers used outside a vehicle.

Baby monitors and pulse oximeters: Consumer-grade home monitoring devices have not been shown to reduce the risk of SIDS and are not recommended by the AAP as a safety measure in healthy infants 1Ref 1Moon RY, Carlin RF, Hand I; AAP Task Force on Sudden Infant Death Syndrome and the AAP Committee on Fetus and Newborn (2022).Sleep-Related Infant Deaths: Updated 2022 Recommendations for Reducing Infant Deaths in the Sleep Environment.Core AAP 2022 safe sleep recommendations: back position, firm flat surface, room-sharing without bed-sharing, no soft objects, inclined surface limit of 10 degrees, swaddling transition at first roll. They may provide reassurance but should not replace the recommended safe sleep environment.