Made for warmer temperatures and peaceful nights, our 1.0 TOG Sleep Bag—also known as a sleep sack—is crafted from two layers of GOTS certified organic muslin cotton for lightweight breathability and softness. Designed for room temperatures of 75–81°F (24–27°C), it features a side-to-bottom zipper for easy diaper changes and underarm snaps on sizes 0–9 months to ensure the perfect fit as your baby grows.