* Small stain but never worn. Probably from a small sticky hand. Never washed. Made from the same buttery-soft fabric as our sleep bags, these bamboo walkers feature ankle cuffs to keep the warmth in while also allowing for safe mobility. 2.5 TOG TOG (or Thermal Overall Grade) is a rating system that measures warmth and calculates how quickly a fabric uses heat. It is the standard when choosing the appropriate sleeping bag for your baby, depending on the ambient temperature in your nursery. We recommend a heavier TOG during cooler months and a lighter one during warmer months.