Why should parents use a baby sleeping bag instead of blankets?
Baby sleeping bags create a safe sleep environment by preventing loose covers, helping babies maintain a steady temperature, and encouraging the recommended back-sleeping position. They reduce the risk of overheating and give parents peace of mind that their little one is sleeping safely and comfortably.
Here’s a guide to the key benefits, how to choose the right size and TOG, plus when to switch to sleeping bags with feet.
Why Baby Sleeping Bags Make Sleep Safer
When you’re setting up your baby’s sleep space, it’s easy to get lost in endless products. The truth is, you don’t need much: a safe cot, a firm mattress, a room thermometer and a baby sleeping bag.
Baby sleeping bags are widely recommended by safe sleep experts, including The Lullaby Trust, because they:
✔ Prevent your baby from slipping under loose blankets
✔ Keep them at a consistent, safe temperature all night
✔ Encourage back-sleeping, the safest position for babies
✔ Reduce the risk of overheating from extra layers of bedding
Unlike blankets, sleeping bags can’t be kicked off or tangled, which means fewer night-time wake-ups from being too cold or too hot - a benefit for both baby and parents.
At Slumbersac, all our sleeping bags are tested to the latest British Standard (BS 8510:2009) for baby sleepwear safety, giving you extra reassurance.
The Right TOG for Every Season
Parents often ask: “What TOG sleeping bag should I buy?” TOG is a measure of warmth. Choosing correctly keeps your baby comfortable in changing seasons.
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0.5 TOG → Lightweight for hot summer days or heatwaves
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1.0 TOG → Perfect for warm rooms and spring nights
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2.5 TOG → All-rounder for year-round use in most homes
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3.5 TOG → Extra cosy for chilly winters and cooler nurseries
Tip: Use our TOG chart to see what your baby should wear underneath their sleeping bag for each room temperature.
Getting the Size Right
For safety and comfort, size matters:
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The neckline should fit snugly so your baby’s head can’t slip inside.
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Armholes should allow easy movement but not gape.
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Underarm poppers (found on Slumbersac bags up to 36 months) give a secure fit for growing babies.
Always size for your baby’s current height, not their “room to grow” size - bigger isn’t safer.
Sleeping Bags With Feet – Freedom to Move
Not every baby enjoys the feeling of a standard sleeping bag. That’s why our sleeping bags with feet are now available from birth through to 10 years, giving little ones more freedom to move right from the start.
✔ Suitable for babies who don’t like feeling restricted
✔ Allows toddlers to toddle safely without tripping over fabric
✔ Fold-over feet covers keep toes warm and cosy at night
✔ Non-slip soles add grip for safe steps on hard floors
✔ Offers the same snug comfort of a sleeping bag, but with added mobility
These designs are loved by families looking for a practical all-rounder - perfect for sleep, early-morning cuddles, and active playtime.
More Than Safety – Everyday Benefits
While safety is the main reason parents choose baby sleeping bags, there are other advantages too:
✔ Fewer wake-ups because babies don’t kick covers off
✔ Easier bedtime routines, as the bag becomes a “sleep cue”
✔ Practical for parents - no extra bedding to tuck in
✔ Washable and durable, making them great value long-term
Many parents say their baby’s sleeping bag becomes part of the bedtime ritual, helping little ones understand it’s time to settle. You can also explore our bedtime routine tips to make evenings calmer.
FAQs on Baby Sleeping Bags
Do babies still need blankets with a sleeping bag?
No - a sleeping bag replaces the need for blankets.
How many sleeping bags should I own?
Having 2-3 per size is helpful so you always have a clean one ready.
Can I use a sleeping bag from birth?
Yes, if the bag is the right size and weight. Our 2-in-1 swaddle bags are a great option for newborns.
What if my baby doesn’t like it at first?
Introduce it gradually - start with naps before bedtime so your baby gets used to the feel.
Safe Sleep Made Simple
A baby sleeping bag is one of the simplest ways to keep your little one safe, warm, and comfortable at night. They reduce risks, prevent night-time wake-ups, and become a reassuring part of your bedtime routine. Whether it's a swaddle bag, baby sleeping bag or sleeping bag with feet, Slumbersac has a style to suit every stage of your child’s sleep journey.
