Quick answer

For winter, choose the 3.5 TOG Sleep Suit & Pajama Bundle if your baby's room stays below 61°F; choose the 1.0 TOG version for rooms between 68°F and 75°F. Your room temperature determines the right TOG, not the season alone.

Why room temperature matters more than the calendar

Winter temperatures vary widely between homes. A well-heated nursery may stay near 70°F, while a drafty room or one with low heat may drop into the 50s. The TOG rating of a sleep suit directly matches a specific room temperature range, so checking a thermostat is more reliable than relying on the month.

Trade-off: warmth versus versatility

The 3.5 TOG bundle provides the highest insulation for cold rooms, but it is a single-purpose winter solution. The 1.0 TOG bundle works for a wider range of temperatures and can be layered under for extra warmth, making it more versatile if your room temperature fluctuates or if you want a suit that transitions into spring.

Decision rules for choosing your winter TOG

  • Check your nursery temperature: Use a room thermometer to measure the temperature at your baby's sleep level. This is the single most important step.
  • Match TOG to temperature range: If the room is below 61°F, choose the 3.5 TOG bundle. If the room is between 68°F and 75°F, choose the 1.0 TOG bundle. For temperatures between 61°F and 68°F, the 1.0 TOG with a long-sleeve onesie underneath is a safe option.
  • Consider layering flexibility: The 1.0 TOG bundle allows layering for extra warmth, while the 3.5 TOG is designed to be worn alone in its recommended temperature range. If your room temperature varies, the 1.0 TOG gives you more adjustment options.

Product facts

  • Sleep Suit & Pajama Bundle | 3.5 TOG | Forest | Blue Turtally: Designed for room temperatures below 61°F. Built-in legs and feet allow safe movement, with grip pads to reduce slipping. This is the warmest option for truly cold nurseries, and the grip pads help prevent slips as your baby moves around.

    Sleep Suit & Pajama Bundle | 3.5 TOG | Forest | Blue Turtally

    Sleep Suit & Pajama Bundle | 3.5 TOG | Forest | Blue Turtally

  • Sleep Suit & Pajama Bundle | 1.0 TOG | Powder Blue Twinkle | Mist Blue Turtally: Designed for room temperatures between 68°F and 75°F. Fabric elasticity allows comfortable layering underneath for further insulation. If your winter nursery stays above 68°F, this bundle provides enough warmth without overheating, and you can add a onesie if needed.

    Sleep Suit & Pajama Bundle | 1.0 TOG | Powder Blue Twinkle | Mist Blue Turtally

    Sleep Suit & Pajama Bundle | 1.0 TOG | Powder Blue Twinkle | Mist Blue Turtally

Which bundle fits your winter?

Best for

  • Families with nurseries consistently below 61°F who need maximum warmth
  • Parents who want a single, no-layering solution for very cold rooms

Not for

  • Milder winter nurseries above 68°F, where the 1.0 TOG or a lower TOG suit is more appropriate