Our flexible long-sleeve sleep sacks provide continuous warmth for cool nights, giving your baby enough room to stretch, roll, and wiggle freely.

As the Bump's pick and the best choice for first parents, our sacks are crafted with a feather-soft 100% GOTS-certified organic cotton shell that's gentle on sensitive skin.

Inside, the premium fabric of 30% camel wool and 70% SORONA® polyester offers breathable temperature regulation and lasting durability. Our 1.0 TOG style features unpadded sleeves to prevent overheating.