The Slumber Lab

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baby sleep temperature

How Sleep Sack Fabric Affects Baby Sleep

Some sleep sacks feel cool at bedtime but trap heat overnight. Here's what parents should look for when choosing a cooler sleep sack.

best sleep sack for hot sleepersWhich Sleep Sack Stays Coolest Overnight?

Which Sleep Sack Stays Coolest Overnight?

Not all sleep sacks feel the same overnight. Here's what many parents notice when comparing popular bamboo sleep sacks for hot sleepers.