PREMIUM FABRICS FOR BEST COMFORT - The award-winning 4 Season® Ultimate Baby Sleep Bag keeps your baby at a perfect temperature throughout the night, year-round. That means there’s no need to worry about which weight sleeping sack to use, or whether your baby will be too hot or cold while sleeping – they’ll always be just right!

SAFER, BETTER, AND LONGER SLEEP - Made with super-soft and supremely breathable merino wool, it helps keep your baby warm when it’s cold and cool when it’s warm. That temperature regulation means that your baby will sleep comfortably throughout the night– and that means a better night's sleep for you too. Cuddly-soft organic cotton outer adds to the comfort as it's perfect for the most delicate skin.

THE ONLY SLEEP BAG YOU NEED – With a universal size that fits babies from 2 months to 2 years, there is no need to worry about buying different sleeping bags as your little one grows or as the seasons change. You only need one Woolino sleep bag, right up until your baby turns two! And for toddlers, we’ve got you covered too, with a size for ages 2-4 years.

• Premium natural fabrics
• Silky-soft hypoallergenic merino wool lining and the finest organic cotton outer.

• 4 Season use 
• Unlike other brand sleep sacks that come in either winter or summer weight/TOG rating, the Woolino 4 Season Sleep Bag can be used year-round. It’s suitable for room temperature 63-75F (17-24C). Because of merino’s unique ability to regulate body temperature, it helps keep your baby warm when it's cold and cool when it's hot.

• Grows with your baby 
• It has a universal size so it can be used for babies 2 months up to 2 years old. For smaller babies, simply close the underarm snaps to adjust the fit. Toddler size fits from 2 - 4 years.

• Excellent value 
• You don’t have to buy a different sleep bag every few months. Woolino Ultimate 4-Season Sleep Bag is the only baby sleep bag your baby needs, in winter or summer, until they turn two years old.

• Designed to be practical 
• It features double shoulder snaps and a two-way side zipper, so it opens up completely flat for easy dressing without waking the baby. For easy nighttime diaper changes, you can open the bottom only. Zipper-pull guards protect baby's skin and discourage baby from chewing on the zipper pull.

• Travel friendly 
• A closable seatbelt opening allows for easy transfer between stroller, car seat, and crib, so you can keep your baby’s sleep routine intact while on the go.

• A safer alternative to loose blankets
• Helps your baby stay covered through the night, replaces loose blankets in the crib, and promotes back sleeping.

• Free Nursery Thermometer with a dressing guide included (baby size only).