How to Choose an Organic Sleeping Bag for Baby
By Wilson and Frenchy | Published: 2026-10-31
Category: Buying Guides
A practical guide to selecting a safe, comfortable organic sleeping bag for your baby. Learn about TOG ratings, sizing, and key features to ensure a good night's sleep.
Quick answer
Choose an organic baby sleeping bag based on your baby's age, the room temperature (TOG rating), and the features that make nighttime changes and safety easy. For most climates, a 1.0 TOG cotton sleep sack offers year-round versatility.
Why TOG Rating Matters for Baby Sleep Sacks
The TOG (Thermal Overall Grade) rating tells you how warm the sleeping bag is. A lower TOG (0.5) is best for hot summer nights, while a higher TOG (2.5) is for cold winter rooms. A 1.0 TOG sleeping bag is the most versatile choice, suitable for rooms between 20-24°C (68-75°F), which covers most heated homes year-round.
If you live in a consistently warm climate or your baby runs hot, a 0.5 TOG sack may be better. For colder climates, consider a 2.5 TOG for winter and a 1.0 TOG for other seasons. Always check the room temperature with a reliable thermometer.
Key Features to Look For
Look for a two-way front zip. This lets you change a nappy without fully removing the sleeping bag, which is especially helpful during nighttime changes. A concealed zip flap also protects your baby's skin.
A bell-shaped bottom gives your baby room to move their legs naturally, which is important for hip development. A back vent is useful if you need to clip the sack into a car seat or high chair, though sleeping bags are not recommended for car travel.
Decision Rules for Choosing an Organic Baby Sleeping Bag
- Check the TOG rating for your room temperature: Use a 0.5 TOG sack for rooms 24-27°C (75-80°F), a 1.0 TOG for 20-24°C (68-75°F), and a 2.5 TOG for 16-20°C (61-68°F). A 1.0 TOG is the most versatile starting point. Buy a room thermometer to confirm the temperature before choosing a TOG.
- Choose the right size for your baby's weight and age: Sleeping bags are sized by weight, not age. A newborn bag (up to about 8 kg) will be shorter and narrower. A larger bag (up to 13 kg or more) gives more room to grow. The bag should be snug around the chest but not tight, and the neck opening should be no larger than your baby's head. Measure your baby's weight and compare to the size chart. A bag that is too large can be a suffocation risk.
- Prioritise safety features: Look for a two-way zip (for nappy changes), a concealed zip flap (to protect skin), and a bell-shaped bottom (for hip health). Avoid bags with hoods, loose ties, or heavy padding. Always follow safe sleep guidelines: place baby on their back, in a clear cot, with no extra bedding. Check that the zip is smooth and the fabric is free from loose threads or buttons.
Product Facts
- Organic Sleeping Bag 1.0 TOG: This organic cotton Sleeping Bag 1.0 TOG is soft and breathable, made from a blend of organic cotton and elastane. The breathable cotton keeps your baby comfortable without overheating, and the elastane allows a bit of stretch for gentle movement.
Organic Sleeping Bag 1.0 TOG - Organic Long Sleeved Sleeping Bag 1.0 TOG: This long sleeved organic cotton sleeping bag 1.0 TOG is lightweight and breathable, with a two-way front zip and a concealed zip for safety. The long sleeves provide extra warmth for cooler nights or babies who kick off blankets, while the concealed zip prevents accidental skin contact.
Organic Long Sleeved Sleeping Bag 1.0 TOG
Who Should Choose Which Bag
Best for
- The Organic Sleeping Bag 1.0 TOG is best for babies who sleep in a standard cot and need a simple, breathable sack for most room temperatures.
- The Organic Long Sleeved Sleeping Bag 1.0 TOG is best for babies who tend to feel cold at night or for cooler bedrooms where extra arm coverage helps.
Not for
- Babies who sleep in very hot rooms (above 24°C/75°F) may need a 0.5 TOG sack instead. The long sleeved version may be too warm in those conditions.
