Summer Infant Slumbersack Longsleeve Microfleece, Blue Star

Summer Infant Slumbersack Longsleeve Microfleece, Blue Star

The Summer Infant SlumberSack? is designed to keep your baby warm while sleeping and free from loose bedding which can pose a safety issue. The SlumberSack features a full-length zipper so it’s easy to get baby in and out. A soft cover zipper tab protects baby’s chin from the zipper pull.

Main features

  • Soft, light weight microfleece
  • Full length zipper makes it easy to get baby in and out
  • Fold over zipper tab for extra comfort
  • Machine washable and tumble dry
  • Small size fits 0-6 months, Leg Size fits 6-18 months

Verified reviews



Honestly I do not know what I would do without these. My son is 6 months old and constantly rubs his face while he sleeps. The fold over sleeves keep his crazy hands covered and he sleeps all night without waking himself – like he would do otherwise. The blankets are really soft and warm. Also they unzip from both ends for easy diaper changes. I even leave him in one in the morning when we take my other kiddo to school. I just unzip the bottom zipper a bit and pop his legs out to get him in the carseat. They are worth the money.

Andrea Spirit Lake, ID


Very convenient (because of the zipper) and very warm and cute. I wish they come in bigger sizes as well as my baby is too big for it now! I was very happy with this purchase.

Priscilla Middleton, MI

Good but wish they came in cotton

These are good pajamas but I wish they came in cotton. Also, I wish they made them with the hands that would cover up so the baby doesn’t scratch her face.

Elisha Turkey, TX

Big for its size

I ordered this for my 7 mo old and she is about 14lbs. It is really long in the arms and so we have to roll the sleeves. I love the double sided zipper, I think all sleepsacks need this feature. It keeps her nice and warm and it is long for the size too so she can use it for a while.

Joanna Inwood, IA

Very soft, but arms are a little long.

This slumbersack is really soft and warm for my baby. However, the arms seem like they are a little long. My son is 6 months old, so he may grow into it. But I am afraid that once he grows into the arms, he will be too tall for the sack, as he only has about three to four inches until his feet hit the bottom of the sack. If they could improve the proportions of this sack, I would give it 5 stars.

Sheila Perkins, WV


This is exactly what I needed for a north TX fall evening for my lil man! It’s very soft, washes well and keeps him warm w/out over heating him like some thicker sleepsacks. I wish I would’ve bought 2!

Nelly O Brien, OR

Good.. but could have had more leg space.

I bought the 0-6mo pack for my 3.5month old daughter. I should have checked the specifications correctly. She is already 26″ long and the sack is very snug fit for her right now. I can see her totally hating it in may be three days. I should have taken care of this even before I ordered and got a 6-9mo one. Product wise, its a winner. Our bedroom gets quite drafty at night and I am very happy today that I did not have to surround my LO with fleece blankets anymore.

Nita Goodwin, AR

fantastic sleep sack!

I love that it has long sleeves!! perfect for a new england winter. the fleece is very soft and cozy. I don’t use the little mittens at the end and the arms are a little long, I have to roll up the sleeves, but that’s not a problem at all. I highly recommend this product and the price was better than other brands.

Leeann Aberdeen Proving Ground, MD

So cozy!

These fleece sleepsacks are so soft and cozy. The zipper is very convenient because it can unzip from the top or from the bottom, so you don’t have to take the baby’s arms out if you just need to change the diaper. The zipper tab at the top tucks into a little pocket so it won’t accidentally get unzipped. We had to turn up the sleeve cuffs so our 4 month old could still play with his hands, but he loves it.

Genevieve Winter Park, FL