The BEST sleep sacks because this one size fits from age 4 to 24 months. It's an investment but you will only by 1 for all 4 seasons and it will last for years. Otherwise you will have about 4-6 sleep sacks in your life for different sizes and different seasons. I LOVE the weight of this sleep sack. It's substantial and makes your little one feel safe and cozy. It's made of high quality wool which is the best material for regulating your baby’s body temperature. You really can use it in the winter AND the summer.
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