1.0 Tog vs 2.5 Tog Sleeping Bags: Which Tog for Your Baby?
By Pushchair Expert | Published: 2026-11-04
Category: Buying Guides
Compare 1.0 tog and 2.5 tog sleeping bags using real product examples. Learn which tog suits your baby's age and nursery temperature, and the trade-offs of each.
Quick answer
Choose a 1.0 tog sleeping bag for warmer nurseries (around 21–24°C) and babies who sleep arms-out, typically from 3 months. Choose a 2.5 tog bag for cooler rooms and younger babies (0–6 months) who need extra warmth. Match the tog to your typical nursery temperature and your baby's age, not the season alone.
Why tog and age go together
Tog measures thermal insulation, not room temperature alone. A 1.0 tog bag is lightweight and breathable, while a 2.5 tog bag provides more warmth. But age matters because younger babies often need more warmth and different fits. The ergoPouch Jersey Sleeping Bag is designed for arms-out sleepers from around 3 months, so it suits older babies in warmer rooms. The Little Green Sheep Organic Baby Sleeping Bag is sized for 0–6 months, a group that generally needs more warmth and a snugger fit.
The trade-off: warmth vs overheating risk
A 2.5 tog bag keeps a baby warm in cooler rooms, but it can cause overheating if the nursery is warm or if the baby is dressed too heavily underneath. A 1.0 tog bag reduces overheating risk in warmer rooms but may not be warm enough in cooler months. There is no single right tog; you need to check your nursery temperature and your baby's comfort. If you are unsure, start with the lighter tog and add layers underneath, rather than choosing a heavier bag and risking overheating.
Key trade-offs between 1.0 tog and 2.5 tog
- Warmth vs overheating: A 2.5 tog bag offers more warmth for cooler rooms but carries a higher overheating risk if the room is warm or the baby is overdressed. A 1.0 tog bag is safer in warm rooms but may need extra layers in cooler weather. Always check your nursery temperature before choosing a tog.
- Age and fit: The 1.0 tog ergoPouch bag is designed for arms-out sleepers from about 3 months, while the 2.5 tog Little Green Sheep bag is sized for 0–6 months with an adjustable underarm fit. Younger babies often need the higher tog and a snugger fit. Match the bag's age range to your baby's current stage.
- Seasonal flexibility: A 1.0 tog bag works well for warmer months or heated rooms, while a 2.5 tog bag suits cooler months or unheated nurseries. You may need both to cover seasonal changes. Consider owning one of each tog for year-round comfort.
Product facts
- ergoPouch Organic All Year Jersey Sleeping Bag | 1.0 Tog | 8-24 Months - Daisies: 1.0 TOG rated for room temperatures between 21–24°C (70–75°F). This bag is a good match for warm nurseries or summer months, reducing the risk of overheating.
ergoPouch Organic All Year Jersey Sleeping Bag | 1.0 Tog | 8-24 Months - Daisies - Little Green Sheep Organic Baby Sleeping Bag | 2.5 Tog | 0-6 Months - Dove Rice: 2.5 tog with adjustable underarm fit, sized for 0–6 months. The higher tog provides extra warmth for younger babies, and the adjustable fit helps accommodate growth.
Little Green Sheep Organic Baby Sleeping Bag | 2.5 Tog | 0-6 Months - Dove Rice
Which tog is right for your baby?
Best for
- Babies over 3 months who sleep arms-out and are in rooms around 21–24°C
- Parents in warmer climates or well-heated homes who want to reduce overheating risk
Not for
- Newborns or babies under 3 months who need a snugger fit and extra warmth
- Cooler nurseries below 21°C where a higher tog is needed
