Sleeping bags

Discover our collection of sleeping bags, cozy essentials for peaceful, secure nights for your baby. Made from soft, breathable fabrics, our sleeping bags provide a comfortable and safe sleeping environment for your little one. Designed to facilitate night-time changing and ensure optimum freedom of movement, our sleeping bags are practical and functional. Available in a variety of patterns and colors, you'll easily find the perfect sleeping bag for your baby.

Finding the Right Warmth for Your Baby

Here's how to choose: TOG 0.5 — Room temperature: 24 to 26°C — Ideal for summer nights. TOG 1.0 — Room temperature: 20 to 24°C — Ideal for transitional seasons, spring and autumn. TOG 2.0 — Room temperature: 18 to 20°C — Ideal for cool autumn nights. TOG 3.0 — Room temperature: 16 to 18°C — Ideal for Quebec winters.

Size Guide:

A sleep sack's size should be chosen based on your baby's height in centimetres, not their age. Two babies of the same age can have very different builds. A sleep sack that is too large poses a risk of slipping downward. One that is too small restricts leg movement and can interfere with healthy hip development.

Here is the Petit Bateau size guide for our sleep sacks:

Newborn size — Baby's height: up to 60 cm — Approximate age: 0 to 3 months.
6-month size — Baby's height: 60 to 74 cm — Approximate age: 3 to 9 months.
18-month size — Baby's height: 74 to 86 cm — Approximate age: 9 to 24 months.

What does a good fit look like? The shoulders are well supported, the baby can bend their legs freely, and the fabric doesn't ride up toward their face. If you're torn between two sizes, go with the larger one. A sleep sack that fits a little loosely at the shoulders is perfectly safe as long as all closures are fastened. Babies grow quickly, and you'll get more use out of each size this way.

FAQ

What material should I choose for a baby sleep sack?

The best material depends on the season and the sleep sack's TOG rating. Here are the main fabric families and their uses:
- Cotton: breathable, hypoallergenic, and versatile. Perfect from spring through autumn, it's the most common material in transitional-season sleep sacks.
- Bamboo: ultra-soft, temperature-regulating, and naturally antibacterial. Ideal for babies who tend to overheat at night.
- Cotton gauze or muslin: very lightweight and airy — the natural choice for summer nights and warm rooms.
- Velour and fleece: cosy, soft, and comforting, these materials are designed for the coldest winter nights.
Our Petit Bateau sleep sacks are made from high-quality materials and carefully finished, built to accompany several children over the years without losing their shape or softness.

Sleep sack with or without sleeves: which should I choose?

Most paediatricians recommend sleeveless sleep sacks. The baby's arms remain free to reposition during the night, and they play an active role in regulating body temperature. Long-sleeved sleep sacks are useful during very cold nights or when the nursery regularly drops below 16°C. In that case, pair a sleeved sleep sack with a TOG rating suited to the room temperature.

How many sleep sacks do I need?

The comfortable minimum is two sleep sacks per season: one in use, one in the wash. Three is ideal for families who do laundry less frequently.
If your baby spits up often — which is completely common in the first few weeks — don't hesitate to have three on hand. You'll avoid those middle-of-the-night scrambles.

Until what age is a sleep sack used?

A sleep sack replaces blankets and duvets until a child is able to manage them on their own, which is generally around 2 to 3 years of age. Some children keep using one longer out of habit and comfort, which is perfectly normal. As long as the size is right, the closures are intact, and your child cannot wriggle out on their own, the sleep sack remains the safest sleep solution.

How do I wash a sleep sack?

Machine wash in cold water, with the zipper closed and the sleep sack turned inside out. Avoid fabric softener: it can irritate your baby's sensitive skin and diminish the fabric's thermal properties over time. Petit Bateau sleep sacks are designed to withstand many wash cycles without losing their shape, softness, or thermal effectiveness.