Sleep bags are the very best sleep wear for the babes. These sacks are the safest option when it comes to keeping little toes warm and comfy in the crib. Here at Kyte BABY, we make sleep bags from all-natural bamboo that are incredibly soft to the touch. Let’s talk TOG. Tog is the rating system that measures warmth and calculates how quickly a fabric uses heat. With dropping temperatures, we recommend the 2.5 tog sleep bag for winter.