Merino Wool Baby Sleep Sack - Adjustable Fit

100% Merino Wool Lining / 100% Organic Cotton Outer

Top Choice Award Winner and Best Seller
Since 2010, Woolino has been leading the market for merino wool baby sleep sacks in the US and Canada, recognized by Creative Child's 2018 Top Choice of the Year Award and multiple Mom's Choice and Cribsie Awards in 2021.

Reduce or Eliminate Sleepless Nights

Breathe Easy with Optimal Comfort
Experience the perfect balance of comfort and temperature regulation with our 100% Australian merino wool lining. This natural fiber is luxuriously soft and temperature regulating, ensuring your baby stays cozy and cool in any season.

Premium Fabrics for Best Comfort

Australian Merino Wool Lining
Our lining is made from 100% natural Australian merino wool, renowned for its unparalleled softness and breathability. It effortlessly adapts to changes in the environment, making your baby's sleep more peaceful.

GOTS Certified Organic Cotton Outer
The outer shell is crafted from 100% GOTS certified organic cotton, ensuring durability and sustainability. This material is gentle on your baby's skin and environmentally friendly.

The One and Only Sleep Sack

Universal Fit for Growth
Designed to last from 2 months to 2 years, our sleep sack fits a range of baby sizes, making it the ultimate companion throughout your child's early years.

4 Season Use

Year-Round Comfort with Merino Wool
Our merino wool sleep sack regulates body temperature, making it suitable for all four seasons. Whether it's chilly winter nights or warm summer days, your baby can enjoy comfortable and consistent sleep.

Maximum Versatility

Easily Dress and Change
With double shoulder snaps and a two-way zipper system, dressing and changing your baby is a breeze. Closable seat-belt slots allow easy transfers between stroller, bouncer, crib, etc., enhancing your daily routine.

Grows with Baby
Under-arm snaps ensure the sleep sack expands as your baby grows, making it an ideal swaddle transition product.

Premium Quality and Trust

US-Based Brand with Industry-Leading Warranty
Woolino is a trusted US company, committed to providing top-notch customer service and a reassuring warranty. Trust us with the essentials for your baby’s comfort and safety.

Leadership in Merino Wool Baby Essentials
With over a decade of expertise, Woolino has been a leader in merino wool baby products, ensuring uncompromised quality and comfort for your little one.