Woolino's award winning 4 Season Merino Wool Baby Sleep Bag will help keep your baby at a perfect temperature all year round. That means there’s no need to worry about which weight sleep bag to use, or whether your baby will be too hot or cold while sleeping – they’ll always be just right! It’s 100% natural, made with super-fine Australian merino wool that is exceptionally breathable and naturally regulates baby's body temperature. It's fully machine-washable, and is excellent value - it saves you money because you won't need to buy lots of other baby sleeping bags with different TOG ratings. With Woolino 4-season sleep bag or sack, your child will have a comfortable sleep year-round, which will give you peace of mind and a good night's sleep as well. PRODUCT FEATURES Two-way side zipper so you can open it from bottom for diaper changes, or from top - for easy dressing Zipper-pull guards to protect child’s skin and discourage child from chewing on the zipper pull Tag-less back ensures itch-free wear Luxuriously-soft merino wool creates a micro-climate around baby's body, wicking moisture away and regulating body temperature Generous fit to let baby move and kick, promoting healthy hip development Nursery thermometer with dressing guide included Read more WHY CHOOSE THE WOOLINO 4 SEASON SLEEP BAG? 100% Natural - silky-soft hypoallergenic Australian merino wool lining & organic cotton outer. 4 Season use - because of merino wool’s unmatched ability to regulate body temperature, it provides perfect comfort in all seasons; it keeps baby warm when it's cold and cool when it's hot. Excellent value - year-round use. You don’t have to buy a different TOG rating baby sleeping bag every few months. Easy care - it's machine washable, in addition to merino being naturally odor repellent. Replaces loose blankets - helps baby stay covered through the night and replaces loose blankets in the crib. Read more ABOUT WOOLINO PREMIUM QUALITY We care about all the same things that you care about – that’s why our products meet the highest quality standards. Everything we produce is made with Woolmark and Oeko-Tex 100 certified merino wool and GOTS and Oeko-Tex 100 certified organic cotton. We use nickel free YKK snaps and zippers that are also certified to be lead and phthalates free and carry Oeko-Tex 100 certification, which ensures that products are free from harmful substances. THE MAGIC OF MERINO Unlike most of the 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 temp. 63-77F (17-25C). 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. That temperature regulation means that your child will sleep comfortably throughout the night, year-round – and that means a better night’s sleep for you too. BETTER AND LONGER SLEEP A study done by University of Sydney has found that a better night's sleep is achieved when sleeping in wool. Significantly finer than other types of wool, Merino is the perfect fiber to have next to child's sensitive skin. It breathes, regulates temperature, manages moisture, it is hypoallergenic, easy to care for, and durable. It is naturally perfect. Read more 4 Season Ultimate Baby Sleep Bag 4 Season Ultimate Toddler Sleep Bag 4 Season Basic Baby Sleep Bag 4 Season Baby Sleep Bag with Feet Organic Cotton Basic Baby Sleep Bag Organic Cotton Adjustable Baby Sleep Bag Fabric 100% Merino Wool Lining & 100% Organic Cotton Outer 100% Merino Wool Lining & 100% Organic Cotton Outer 100% Merino Wool Lining & 100% Organic Cotton Outer 100% Merino Wool Lining & 100% Organic Cotton Outer 100% Organic Cotton 100% Organic Cotton Sizes Available 2 - 24 Months 2 - 4 Years 0-6 Months, 6-18 Months, 18-36 Months 6-18 Months, 18-36 Months, 3-4T 0-6 Months, 6-18 Months, 18-36 Months 2 - 24 Months Colors Available Gray, Earth, Navy Blue, Lilac, Rose, Night Sky, Rainbow, Rust, Succulent, Star White, Star Gray, Sheep, Panda, Whales Gray, Earth, Navy Blue, Lilac, Rose, Star White, Star Gray, Space, Night Sky Gray, Earth, Navy Blue, Stars, Panda, Butterflies Gray, Navy Blue, Panda, Butterflies, Night Sky Silver, Blush, Deep Blue Desert, Elephant, Dandelion, Triangle, Heart Shoulder Snaps ✓ ✓ ✓ Underarm Snaps to Adjust the Fit for Smaller Babies ✓ ✓ ✓ 2-Way Zipper ✓ ✓ ✓ ✓ ✓ Safety-Belt Slots / Travel Friendly ✓ ✓ ✓ Foot Openings to Provide Mobility when Child is Awake ✓ Replaces Loose Blankets for Safe Sleep ✓ ✓ ✓ ✓ ✓ ✓ 4-Season Use ✓ ✓ ✓ ✓