Extra cozy and featured in our signature, hand-painted prints, our Quilted Sleep Bags are a safe and warm blanket alternative during the cooler months of the year. Quilted layers of soft cotton muslin keep heat inside while a unique, breathable design allows air to flow freely — creating a comfortable and cozy sleep environment for baby throughout the night. 2 way zipper for easy nighttime diaper changes Machine washable cotton muslin that gets softer with every wash 2.6 tog Babies come in all shapes and sizes. Please reference our size chart to help you find the proper size for your baby. Size Baby Weight Baby Height Baby Age Small 10-18 lbs 23"-26" 0-6 months Medium 16-24 lbs 26"-30" 6-12 months Large 20-28 lbs 28"-32" 12-18 months X-Large 27-30 lbs 30"-35" 18-24 months