Introducing the Cool Blue Sleep Sack 0.5. Made from breathable yet cozy Bamboo. Our sleep sack has a double zipper feature. 

Sizes: 0-6m (28 1/3 Inches), 6-18m (34 5/8 Inches). No need to size up!

TOG rating – aka Thermal Overall Grade – measures coziness. The higher the TOG, the toastier the sack, while a lower rating = lighter material. Opt for a lighter TOG in hot months, and heavier in cold.