Magic Merlin Sleep Suit – in this weather?


My son, James, was the first Isis baby to try the Merlin! Here he is proudly wearing his pink Baby Merlin Magic Sleepsuit in the summer of 2011. ­­­­(I didn’t dare take a photo when he was sleeping!)

If you’ve seen the Baby Merlin Magic Sleepsuit at Isis, you may have wondered why we are selling what looks like a snow suit in the summer. I know that was my initial reaction when the sleep suit was given to me in the summer of 2011!

My son was born in June and I brought him into Isis to show him off to my co-workers. The Merchants asked if I’d be willing to try out a new sleep product that a vendor sent them for feedback. I was given a pink Baby Merlin Magic Sleepsuit (yes, pink- for my son). If you know me, you know that I am all about sleep safety so I had a lot of questions about this product; but I agreed to take it home and try it out.

I put the Merlin in a dresser and forgot all about it for a few weeks. My son was sleeping a good 4-5 hours straight in the Woombie, so there was no need to think about the Merlin quite yet. But then James turned 10 weeks old and learned how to roll from his back to his stomach. After finding him not once, but twice, face down in the Woombie, obviously very upset (and obviously not in a very safe position), it was time to stop using any type of swaddling. The first night was tough. He woke up every 45 – 60 minutes due to his arms moving all around. He was not a happy baby. I was not a happy momma. Night two was even harder. He was waking up every 30 minutes. Around 2 am I said to my husband, “Where is that pink suit?” We put him in the Merlin and he slept until 7 am. We tried it again the next night and he gave us a 7 hour stretch of sleep. Could it be? Was the Merlin really magic?

We continued to use the Merlin with my son until he was almost 8 months old. Soon after we started using it, he was giving us 9-10 hours of consolidated (beautiful) sleep. The only reason we stopped using it was because he was strong enough to roll while wearing it (and the Merlin is only safely designed for back sleep).

The Merlin is, without a doubt, my favorite sleep product! Although it is not designed for newborns, it is helpful beginning around 3 or 4 months, or when baby can no longer be swaddled. It makes this transition easier, since it keeps baby feeling “cozy”, and helps to minimize the baby’s startle reflex and other movements that can impact sleep. I recommend this product often during sleep consultations for babies ages 3-7 months old, especially as a useful tool in helping a baby transition from sleeping in a swing to sleeping in a crib, or sleeping in the crib instead of in the arms of mom or dad!

If you’re wondering if this product can be used during the summer, the answer is YES! Next time you’re at an Isis Parenting center, feel it. The material is breathable and lightweight. There is a scooped neck and open feet for ventilation. You’ll want to keep the room cooler rather than warmer (but this is true no matter what your baby is wearing while sleeping), but this product can be used in any season. If you’re concerned about the room being on the warmer side, then dress your baby in a lighter pair of pj’s, or perhaps only in a onesie (and a pair of socks) underneath the Merlin.


Teresa Stewart, MS, MPH
Isis Parenting Program Manager: Safety, Wellness, Sleep Support

About Teresa Stewart MS MPH

Teresa Stewart is the Program Manager of Sleep Support and Safety at Isis Parenting and has been a proud member of the Isis team since 2007. Teresa holds a MS in Child Development from Wheelock College and an MPH in Maternal and Child Health from Boston University School of Public Health. She is certified by the American Heart Association as a CPR and First Aid instructor. Teresa is a member of the Safe Kids Boston Coalition and MassPinn (Massachusetts Prevents Injuries Now Network). She combines her areas of expertise to help parents understand why our children do the mysterious things they do and how to keep them healthy and safe. Teresa also supports parents around sleep through her work as an Isis Sleep Consultant and co-contributor to Sleep from Birth to One Year, from the Isis Online Parenting School. She recently presented at the Zero to Three’s National Training Institute on the Isis Sleep Support Program. Teresa is the mother of a school-aged daughter and toddler son and understands the joys and challenges of parenting.

8 Responses to Magic Merlin Sleep Suit – in this weather?
  1. Marissa
    June 21, 2013 | 1:25 pm

    The Magic Sleep Suit – is legit magic. My little guy went in it at 3 months and slept 12 hours a night since. I give one to every expecting mother I know!

  2. Erin
    June 21, 2013 | 2:54 pm

    It was also magic for our little one! She is a super sweaty baby but never got overheated in the sleep suit – I was skeptical, but it really is breathable.

  3. Erin
    June 25, 2013 | 12:46 pm

    I love the sleepsuit but it is too hot for my sweaty baby when we travel to places without air conditioning. Do you have any suggestions for weaning off the suit?

  4. Maureen
    June 25, 2013 | 11:19 pm

    Magic Sleepsuit can be worn all year round as long as the room temp is ok and baby is comfortable.

  5. Patty
    July 1, 2013 | 11:40 am

    My niece’s baby is due in mid August. This is her first baby so she has a long list of things the needs/wants. For her baby shower, I was willing to buy her just about anything, but having heard Teresa strongly recommend the Merlin I knew I had to get her that.
    The center associates at Merchants Row were so very helpful picking out other quality products to go along with the Merlin, so my niece will have some great surprises as part of her baby’s gift. Can’t wait to give it to her.

  6. Susie
    July 3, 2013 | 11:54 am

    What was your experience of transitioning out of the suit? I have a a 6 month old who still uses it and everytime I try and transition out, it makes for crying and rolling so I end up putting it back on. She has not yet rolled in the crib with it on. Thanks!

  7. Jess
    July 3, 2013 | 2:38 pm

    I live in Fort Lauderdale Florida and my daughter still wears her sleep suit and its hot but we have the hair and 2 fans on in our room so she’s fine.

  8. Teresa Stewart
    July 6, 2013 | 11:38 pm

    Hi Susie-

    If your daughter isn’t rolling yet while wearing the Merlin, I recommend keeping her in it a bit longer :) That way, by the time she has outgrown it, or is strong enough to roll in it, it won’t impact her sleep as much to be without it. Developmental milestones can impact sleep, especially gross motor ones, like rolling, crawling, pulling to stand, etc. Babies like to practice at night what they are learning during the day! We have a webinar ( on this topic: February 12 , 2013 – Rolling, Sitting, Standing: Motor Development & Sleep Disruption that can provide more tips.

    But when the day comes that you need to say goodbye to the Merlin, you can transition into a sleep sack to help her still feel “cozy” and to minimize some of the movements she’ll be doing. Then the most important thing is to have a “Plan B” for how you are going to respond/soothe if she does wake-up or resist at bedtime, that will help her learn to self-soothe without the Merlin and continue to give you nice long stretches of consolidated sleep. Feel free to check out our webinars, or if when you get to this stage, call us for a sleep consult: 781-429-1500 and we can help you put together a plan that will work for your family.

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