Grobag Support



Find some answers to the most frequently asked questions about your Grobag.

What is a Baby Sleep Bag?

A Baby Sleep Bag is a wearable blanket for babies that’s designed to be used instead of traditional blankets and sheets. Baby Sleep Bags have a neck opening and armholes, so your baby wears them to help stay at the right temperature through the night. Unlike traditional blankets and sheets, baby can’t kick them off or get tangled up in a Baby Sleep Bag.

Are Baby Sleep Bags safe?

Yes. Well-fitting Baby Sleep Bags with the right warmth rating, when used correctly, are potentially one of the safest forms of bedding for your baby. Your baby has complete freedom of movement within the Baby Sleep Bag, and the fitted neck and armholes mean there’s no danger of them slipping in or out of the Baby Sleep Bag as long as you’re using the right size for you baby’s age/weight. Provided that your baby wears a suitable level of nightwear with the Baby Sleep Bag, they should be able to sleep safely at a pleasant and constant temperature throughout the night.

Why should I use a Baby Sleep Bag instead of blankets and sheets?
  • A Baby Sleep Bag can stop babies kicking off their covers, getting cold and waking themselves and everyone else up.
  • They can’t be kicked over your baby’s head or get tangled up.
  • They keep babies at a comfortable temperature all night long.
  • Your baby can wake up, move around his cot, and fall back to sleep all on their own without you having to tuck them back in.
  • They become a great part of the bedtime routine, and will help your baby feel familiar, secure and confident and understand when it’s time for bed, even when away from home.
  • They can help your baby transition from Moses basket to cot by being the familiar “comforter” in both.
Can I use a Grobag Baby Sleep Bag in a Moses basket?

Yes you can, but there will be extra fabric which you can either tuck under the mattress or fold at the end of the basket. If your baby is under 12lbs, you could use a Grosnug or Groswaddle which will fit into the Moses basket perfectly.

What should my baby wear under a Grobag Baby Sleep Bag?

What your baby wears will depend on the tog of Grobag Baby Sleep Bag and the temperature of your baby’s bedroom. As a guide, please refer to the table below. Please remember that babies are all different and, just as with blankets and sheets, you will soon discover what your baby is most comfortable wearing. Placing your fingers on your baby’s chest is the best indicator of whether they are too hot/too cold/just right as babies’ hands often feel cool.

Nursery Temperature 3.5 TOG 2.5 TOG 1.0 TOG 0.5 TOG
24-27°C (75-81°F)       Nappy/Sleeveless bodysuit
22-24°C (72-75°F)     Sleeveless bodysuit/Short-sleeved bodysuit  
20-22°C (68-72°F)     Long-sleeved bodysuit  
18-20°C (64-68°F)   Long-sleeved bodysuit    
Under 18°C (64°F)   Gro-suit    
16-18°C (61-64°F)   Sleepsuit/Gro-suit/PJs    
14-16°C (57-61°F) Short-sleeved Bodydsuit/Long-sleeved Bodysuit + Sleepsuit/Grosuit/PJs Long-sleeved bodysuit/Sleepsuit/ Gro-suit/PJs    



What should my baby wear under a Grobag Baby Sleep Bag?


Which weight of Grobag Baby Sleep Bag should I buy?

If your nursery is usually below 68F/20°C, we recommend a 2.5 tog Grobag. If you live in a particularly mild region or if you have well insulated and heated accommodation and your nursery is usually 70F/ 21°C or above, you may prefer a 1.0 tog Grobag for year-round use.

For really cold weather, when room temperatures are 61F/16°C or below we also offer a thicker 3.5 tog.

If you only have a 2.5 tog, we recommend trying to keep the room temperature your baby is sleeping in within the 61F-68F/ 16-20°C range and layering clothing under their Grobag according to the guide above

What does the tog rating mean? And why are Grobags rated less than my bedding?

The tog rating describes the warmth of a product. Health professional guidelines recommend that Baby Sleep Bags should be lightweight. A Baby Sleep Bag surrounds the baby, providing insulation from both below and above, creating a warm pocket of air around your baby, where a quilt or comforter mainly provides insulation from above.

Because it has a low tog rating, Grobags give you great versatility throughout the year, simply by adjusting your baby’s nightwear. When the weather is very cold, add more clothing such as a sleepsuit, socks or sweater. When the weather is warmer, or if your child is unwell, you can remove layers of clothing while still keeping your baby at the right temperature.

Never use a quilt, blankets or comforter with a Baby Sleep Bag.

What is the best room temperature for my baby?

The Lullaby Trust and Health Professionals recommend that the ideal room temperature for your baby is between 61F/16°C and 68F/20°C, and ideally at 18°C/65°F. Our 2.5 tog Grobag Baby Sleep Bags are designed to be used in this temperature range.

If the nursery is warmer or colder, simply adjust the level of clothing your baby is wearing. During summer months, or in warmer climates, if your baby’s nursery is above 68F/20°C we recommend using our 100% cotton 1.0 tog or 0.5 tog Grobags.

What size Grobag Baby Sleep Bag should I buy?

Our 0-6 month size Grobag Baby Sleep Bag is suitable from birth if your baby weighs 8.8lbs (4kg) or more or from when your baby reaches this weight. It will last until your baby is 6 months old and may well last longer.

The 6-18 month size is suitable from when your baby is 18lbs (8.1 kg) and is generously sized so may easily last until your baby is between 18 and 24 months.

How many Grobag Baby Sleep Bags should I buy?

As the larger sizes last for at least a year, we recommend you buy at least 2 Grobags (so you will always have a spare one if you suddenly need one in the middle of the night!).

What other bedding can I use with my Grobag Baby Sleep Bag?

Your Grobag is designed to be used instead of blankets and sheets. The only other bedding you need for your baby is a bottom sheet.

Never use your Grobag Baby Sleep Bag with a quilt, comforter or blankets.

When do I stop using a Grobag Baby Sleep Bag?

You can use a Grobag Baby Sleep Bag right up to the time your child is ready to move from a cot to a bed. And because they allow a certain freedom of movement you can use them even longer if your child wishes. Even though your toddler will happily stand up in a zipped Grobag, cot-climbing will be far from easy, and your Grobag may well delay the age at which you have to move your child to a bed – a big bonus!

Why is the weight of the baby so important for the smaller size Grobag Baby Sleep Bag?

Our key safety consideration is to ensure that babies cannot slip down inside the Baby Sleep Bag. We design neck openings to be large enough to allow comfort and heat loss, but smaller than the average head circumference of the younger age/lower weight of baby we advise for the Grobag Baby Sleep Bag. We use graphs produced by health professionals to link head sizes with weight. Most new parents don’t know their baby’s head circumference, but do know their weight, so we use weight as a guide.

It’s important not to let your baby’s head get covered by sheets, blankets or anything else when they’re sleeping. Using a Grobag Baby Sleep Bag can help prevent this.

When can I first put my baby in a Grobag Baby Sleep Bag?

Our 0-6 months Grobag Baby Sleep Bag can be used for a full-term, 8.8lbs (4kg) baby from birth. If  your baby weighs less than 8.8lbs (4kg) at birth, we recommend you wait a short time, until your baby grows larger. For the first few weeks and for babies under 8.8lbs (4kg), we recommend the Groswaddle or the Grosnug as a safe and easy alternative for your baby. Our 0-6 month size Grobag includes under-arm poppers to reduce the size of the armholes for babies up to 10lbs (4.5kg).

How do I wash and dry my Grobag Baby Sleep Bag?

You can machine wash all Grobag Baby Sleep Bags at 104°F/40°C. Hang them out to dry or tumble dry on a low setting. As with all cotton goods, we have designed our Grobags to allow for up to 5% shrinkage. If your child has any allergies and you wish to wash your Grobag at 140°F/60°C, you should allow for a little more shrinkage.

We recommend:

  • Keeping the zip closed when washing
  • Washing dark colours separately for the first few washes
  • Washing your Grobag with a detergent that is free from bleaching agents to retain the original colours.

If you want to iron your Grobag, select a low heat setting and keep the iron away from the zip or cover the zip with a cloth.

How do I wash and dry my Grobag Baby Sleep Bag?


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