The roomy design allows your little one plenty of room to move around. It doesn't constrict the hips, and the sleeping bag comes with a seal of approval from the Hip Dysplasia Institute. I started using these sleep sleeping bag with my baby around the two-month mark. Before that, I swaddled my baby, but once he rolled over, I needed another solution. I fell in-love with HALO sleep sleeping bag HALO also makes a swaddle blanket that's soft and cozy, too.
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