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PleaseSleep

Swaddles & sleep sacks

Safe, cozy infant sleepwear.

Swaddles and sleep sacks replace loose blankets, which are not safe in an infant's crib, with wearable warmth. A swaddle snugly wraps a newborn to calm the startle reflex. A sleep sack is a wearable blanket for older babies who have started to roll and need their arms free.

The move from swaddle to sack is a safety milestone: once a baby shows signs of rolling, the arms come out. Choosing the right stage and fabric weight is what matters most.

How to choose swaddles and sleep sacks

Match the stage

Swaddle newborns for the startle reflex. Switch to an arms-free sleep sack as soon as your baby starts trying to roll.

Check the TOG rating

Fabric weight is given as a TOG number. Lighter TOG for warm rooms, heavier for cold, so the baby stays cozy but not overheated.

Easy nighttime changes

Two-way zippers and simple closures make 3am diaper changes far less disruptive.

Safe fit

The sack should be snug at the chest but roomy at the hips and legs for healthy movement. Avoid anything loose near the face.

Frequently asked questions

When should I stop swaddling?

Stop swaddling the arms as soon as your baby shows signs of rolling over, usually around two to four months, and move to an arms-free sleep sack.

What TOG sleep sack do I need?

Match TOG to room temperature: lighter weights for warm rooms, heavier for cold. Dress the baby in a light layer underneath.