Grosnug Support



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

What is the difference between the Grosnug and the Groswaddle?

The Grosnug combines an easy swaddle with a newborn Grobag. There is no risk of overwrapping and the shaped seams allow for natural leg position. You don’t need to know how to swaddle your baby, just place them inside and zip them in. The bottom opening zip also makes it easy for you to do nappy changes without having to completely unwrap baby.

The Grosnug has poppers which allow you to swaddle your baby arms in or arms out – whichever they prefer, allowing them to move onto a Grobag Baby Sleep Bag when they’re ready.

The Groswaddle is our traditional wrap, a shaped swaddle with exactly the right amount of fabric for a safe swaddle – with no risk of overwrapping. You can use it to swaddle your baby arms in or arms out, by using different wrapping techniques.

Why would I want to swaddle my baby?

Babies are used to being snuggly in their mother’s womb so being swaddled reassures them and makes them feel secure. When it comes to sleeping, swaddling can prevent babies from waking themselves from the ‘startle’ reflex. Many parents swear by swaddling to help their newborn baby sleep.

What size does the Grosnug come in?

The Grosnug comes in one size, suitable for babies from 5lbs to 12lbs.

How do I know which type of Grosnug to get?

The Grosnug comes in two weights of fabric:

  • Cosy is for cool rooms between 61-8°F (16-20°C)
  • Light is for warm rooms between 68-75°F (21-25°C)

All Grosnugs come with a free thermometer and what to wear guide.

The Grosnug is not measured in togs because it’s a tighter fit than a Baby Sleep Bag and is designed to be worn in a Moses basket, so that affects the measurement of its warmth.

What is the Grosnug made of?

The Grosnug is made from supersoft cotton with elastane for stretch.

What is the Grosnug made of?


When can I use the Grosnug from?

You can use the Grosnug from birth, as long as your baby is 5lbs or heavier.

What are the poppers on the arms for?

You can place your baby in their Grosnug with arms in (with the poppers popped shut) or arms out (with the poppers open).

  • Arms in allows for a safe swaddle with no wrapping needed.
  • Arms out means that baby can sleep with their arms up. Some babies prefer not to be restricted when sleeping.
  • Arms out is also perfect for transitioning your baby into a Grobag.  They can sleep with one or two arms out.

However you choose to use a Grosnug, your baby will be reassuringly snug at the top and have hip healthy leg space at the bottom. Keeping your baby snugly swaddled means that they won’t wake from the startle reflex.

When can I first start using a Grosnug?

The Grosnug is suitable for use from newborn up until around 3 months or between 5-12Ib/2.2-5.4kg in weight.

Can I use a Grosnug in a Moses Basket?

The Grosnug is perfect for use in a Moses Basket. You can also use it in a cot or a pram.

What should my baby wear under a Grosnug?

As a general rule, in the recommended nursery temperature of 61-68°F (16-20°C) we recommend either a cotton bodysuit (short sleeves and no legs), or a cotton sleepsuit (with legs and arms). If the bedroom is on the cool side, or your baby feels cool to the touch on their back or chest, then you can layer up their clothing, using both a bodysuit and sleepsuit.

But all babies are different so it’s important to check on your newborn baby regularly to ensure that they are not too hot or too cold. To do this, simply place your fingers gently onto baby’s back or chest. It is normal for a young baby’s fingers and toes to feel cold, so they don’t provide a reliable temperature guide.

In a very warm bedroom, you could use the Groswaddle with no clothing underneath. If the bedroom is hot (over 75°F/ 24°C), try to cool it down, and if this isn’t possible then it may be better to leave baby out of the swaddle until it is cooler.

If you choose to swaddle your baby with their arms free as they get older, you may want to adjust their clothing. In the recommended nursery temperature of 61-68°F (16-20°C) we advise using a cotton long-sleeved sleepsuit or both a bodysuit and long-sleeved sleepsuit.

When should I change from over-arm to under-arm swaddling?

Newborn babies usually like to be swaddled over-arm. This gives them the secure feeling that they were used to in the womb, which can help them to settle to sleep better. You will probably find that anywhere between 3 and 6 weeks of age, your baby prefers to sleep with their arms out, but still with the nice comfortable wrap around their tummy. But all babies are different, and you will soon get to know what suits your little one best.

When should I move my baby from a Grosnug to a Grobag Baby Sleep Bag?

Once your baby is happy with under-arm swaddling and wants to move around a little more, this is an ideal time to start using a Grobag Baby Sleep Bag. You can start using a Grobag Baby Sleep Bag when your baby weighs 4kg (8.8lbs).

Can I use a Grosnug with a Grobag Baby Sleep Bag

No. You should never use a Grosnug and a Grobag Baby Sleep Bag together.

Can I use a Grosnug with a blanket over the top?

Your Grosnug 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 Grosnug with a quilt, comforter or blankets.

How can I swaddle my baby safely?
  • Always place your baby on their back to sleep.
  • Do not swaddle your baby with their arms in once they can roll.
  • To prevent your baby getting too hot, follow our temperature and what to wear guides. You can find these here or on the product packaging.
  • Do not use any additional blankets, sheets or other bedding with the Grosnug. Adjust baby’s clothing underneath if you feel your baby is too warm or too cool.
  • Ensure the Grosnug does not go over your baby’s head or cover your baby’s mouth. It should fit snugly around your baby’s neck and sit underneath their chin, but not be too tight.
  • If you pick your baby up to feed or comfort them, check the Grosnug to make sure it’s still secure, and does not cover your baby’s face when you put them down.
  • Make sure there’s enough room in the Grosnug for your baby to move their legs.

Remember to:

  • Tuck excess fabric beneath your baby at all times.
  • Check that you can slide your fingers down the top of the Grosnug to make sure your baby is swaddled snuggly but not too tightly.
How do I wash and dry my Grosnug?

You can machine wash your Grosnug at 104°F/40°C. Hang it out to dry or tumble dry on a low setting. We have designed our Grosnugs to allow for up to 5% shrinkage. If your child has any allergies and you wish to wash your Grosnug at 140°F/60°C, you should allow for a little more shrinkage.

We recommend:

  • Washing dark colours separately for the first few washes
  • Washing your Grosnug with a detergent that is free from bleaching agents to retain the original colours.

If you want to iron your Grosnug, select a low heat setting.

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