When you're choosing a sleep sack for your baby or toddler, you may notice something called a TOG rating, which stands for Thermal Overall Grade. This rating helps show how much warmth a sleep sack provides. The higher the TOG number, the warmer the sleep sack.

When thinking about what TOG sleep sack for spring works best, start with a light base layer like a zip-up sleeper or soft pajamas, then add a sleep sack that matches the room temperature.

Sleep sacks can be a go-to option for babies and young toddlers because they provide cozy warmth without the need for loose blankets in the crib.

Little Sleepies Sleepy Bags come in three different TOG options so you can choose the best fit for your home and your little one.

TOG Rating 

TOG = Thermal Overall Grade (measures the warmth of sleepwear)

– Lower TOG (0.5–1.0) — lighter, best for warmer nights or warmer rooms around 74° - 78° F
– Mid TOG (1.0–1.5) — versatile “all-season” warmth that works well for many spring nights, especially when rooms stay around 68–72°F
– Higher TOG (2.5+) — warmer options designed for cooler rooms around 61°F - 67°F

For many families, light pajamas paired with a sleep sack around 1.0 TOG is the best choice for spring nights.