Woolino sleep sack is perfect as a sleep blanket.
Woolino sleep sack is perfect as a sleep blanket.
Woolino sleep sack is perfect as a sleep blanket.
Woolino sleep sack is perfect as a sleep blanket.
Woolino sleep sack is perfect as a sleep blanket.
Woolino sleep sack is perfect as a sleep blanket.
Woolino sleep sack is perfect as a sleep blanket.
Woolino sleep sack is perfect as a sleep blanket.
Woolino sleep sack is perfect as a sleep blanket.
Woolino sleep sack is perfect as a sleep blanket.
Baby in Merino


Regular price $137.00

Our thoughtfully designed BABY IN MERINO™ Sleep Sack with open legs is a natural progression for your child’s growth.

The open construction of the legs allows your children to grow with the Sleep Sack for long-term use. 

      For living in the colder climates we offer naturally a warmer, 2-layer 100% merino wool Sleep Sack. It provides extra warmth and ultimate coziness.
      This sleep sack is suitable for cooler rooms from 62°F - 75°F (17°C to 24°C), it's perfect for fall, winter, spring, and summer with AC.

      The sleep sacks are designed with two layers of 250gsm NON-superwash high-quality 100% Merino wool that directly touches your baby’s skin.
      Upon instant contact, merino wool is naturally temperature-regulating in both cold and hot climates. This feature creates optimal comfort for baby and child immediately improving their sleep quality.
      Because merino wool is super-soft, its effects are immediate on your child as it creates an instant soothing, tactile effect on their skin, which in turn comforts, relaxes, and creates a sense of cosines along with well-being for them.
      Secured with the same comfortable design of the open armholes & and zipper to ensure that your child stays covered and warm throughout the night!
      After a good night’s sleep from not walking up cold, the addition of the simple foot openings in the legs gives him/her the freedom to get out of bed to walk around safely and play! 

      • Practical and easy to use - front full-length YKK zipper (two-way zipper in sizes 6-12m & 12-24m)
      • Long fold-down cuffs with fold-over closures to cover little toes
      • Suitable for use in temperatures  62°F - 75°F (17°C to 24°C)
      • Soft and itch-free, the best choice for a child who suffers from allergies, and eczema
      • Exceptional thermo-regulating features help little ones stay dry and warm
      • Designed and tested in the USA, made in Slovakia, EU from eco-friendly and GOTS-certified fabric
      • Sleep sacks meet US Children's Sleepwear Safety Regulations
      • Come with a drawstring bag for easy storage


      Sleep sacks are generous in size, we do not recommend sizing up.

      age length of sleep sack* height of child weight of child
      6-12 months 29" (74 cm)  24 - 29 in
      (61 - 73.7 cm)
      11 - 18 lbs
      (5 - 8.2 kg)
      1-2 years 32.5" (83 cm) 28 - 33 in
      (71 - 84 cm)
      17 - 27 lbs
      (7.7 -12.3 kg)
      2-4 years 40" (102 cm) 32 - 40 in
      (81.3 - 101.6 cm)
      26 - 44 lbs
      (11.8 - 18 kg)
      5-6 years 46" (117 cm) 39 - 45 in
      (100 - 115 cm)
      33 - 44 lbs
      (15 -20 kg)

      *from shoulders to the end of cuffs



      Thermal base layers are designed to fit snugly (close to the body). We suggest a size up if you like a more loose fit for your child.

      size T-shirt length **inside leggings 
      3-6 months 11.5" (29 cm) 9.8" (25 cm)
      6-12 months 12.5" (33 cm) 11" (28 cm)
      1-2 years 14" (35 cm) 14" (36 cm)
      3-4 years 15.75" (40 cm) 16" (41 cm)
      5-6 years 17.7" (45 cm)  19.5" (49 cm)
      * T-shirt length - length from the shoulder to the bottom of the T-shirt
      ** Inside leggings - length of the leggings from the crotch to the heel of footed pans or end of the cuffs

      We believe in things that last and want to help your products look good for as long as possible.

      How to care for your merino wool products?

      Merino needs far less washing compared to cotton and synthetic fabrics. Often simply hanging your Merino garment outside on the line for a few hours is enough for it to refresh and renew. This is because it breathes better than any other material and is naturally antibacterial and odor resistant.

      Regular airing of your Baby in Merino Products will keep them fresh. When you do wash your garments, always be sure to follow the instructions on the label.

      • Use environmentally friendly detergent. Wash wool preferably by hand in lukewarm water or with a wool (gentle) cycle, max. 90˚F (30˚C)
      • Never soak your Merino garments, as this destroys the wool fibers.
      • Use only soft spin and do not tumble dry. 
      • Press moisture in a towel, reshape, and dry flat.
      • Do not dry wool in direct sunlight or close to a heating source. 
      • For protection against moths, store wool clothing in a sealed plastic bag when not being used. 
      • We recommend treating your wool garments with an environmentally friendly wool conditioner to preserve their softness and ability to absorb moisture.


      As our wool has not been treated with a synthetic coating, it may pill.
      If pilling occurs, do not despair. This is a natural process where friction causes the short fibers to migrate to the surface.

      Customer Reviews

      Based on 22 reviews
      Canadian C.
      Softest sleep sac ever

      My husband and I are so happy with the quality of these sleep sacs. They are worth every penny. Love that we can use them summer and winter. They are so soft and comfy. I couldn't be happier. Now what else to buy from here? Hahaha

      Great quality.

      Very impressed with the great quality and above all the customer service! She helped me so that I could receive it as soon as possible. The size is big enough and super comfy so my son will be able to use it for many years. Super happy with it and can highly recommend it.

      Beautiful sleep sack

      Absolutely love this. Shipping was so fast. Seller sent tips for care and washing right before the item arrived which was really helpful. I'll definitely be purchasing in the next size.

      Very happy with the purchase

      Beautiful sleep sack and my toddler will wear this one since he doesn't like the traditional "sack" enclosure. He has slept better wearing this, but if the room is over 70 degrees, he gets a little clammy in it. Just to note that I did order the double layer wool sack. Overall, we are VERY pleased!

      Mara, G.
      We are very happy with the sleeping bag.

      I can recommend BabyinMerino sleeping bags to everyone. The baby always has exactly the right temperature in the sleeping bags. They are super soft and high quality. My daughter loves her new sleeping bag. She doesn't even want to take it off anymore. The saleswoman is really very nice and puts a lot of effort into making everything quick and easy. We are very happy with the sleeping bag. A warm sleeping bag without freezing or sweating. Absolute recommendation. Thank you very much, dear Lenka