The 10 Best Sleep Sacks You Can Find on Amazon

Burt's Bees Baby Unisex-Baby Beekeeper Wearable Blanket ($18)

Made with 100 percent organic cotton, this wearable blanket is a No. 1 bestseller on Amazon for "baby wearable blankets" and boasts nearly 29K reviews with 4.7 stars.

"I used transition sleeping bags before, and they were small and overpriced, especially for the quality," one reviewer said. "That's why I changed brand and bought this. This is perfect for our baby: breathable, thin, and soft fabric."

Worth noting, however, is that some reviewers took points off for a finicky zipper.