The 10 Best Sleep Sacks You Can Find on Amazon

Yoofoss Baby Sleep Sack ($27 for three)

Warmer weather doesn't need to mess with your baby's sleep routine. Just swap in a lighter-weight sleep sack. This Yoofoss one, which fits infants and toddlers from 0 to 24 months, is made entirely of cotton. It's also roomy, preventing it from sticking to the little one and adding to its breathability. Despite the looser fit, a two-way zipper keeps it secure.

"[My baby has] outgrown the fleece [sleep sacks] she first had, so I purchased these lighter cotton sleep sacks for the Midwest summer," a reviewer gushed. "They are lightweight and perfect! I also like that they don't have sleeves because they go on so quickly — very pretty colors as well."