Nylon Imported SIZING FOR EVERY BABY: Each Copper Pearl Sleep Sack comes in sizes 0-6 months, 6-12 months, 12-18 months, and 18-24 months. Dimensions range for each size to ensure a snug fit, making these sleep sacks the perfect baby essentials! WARM & COZY: A 1.70 Thermal Overall Grade (TOG) rating, our swaddle sack provide just the right amount of warmth for year-round use. This sleep bag will help your baby sleep soundly through the night in temperatures between 65 – 75 degrees F. BONUS FEATURES: We're good with baby stuff. That's why our baby sleep sacks feature a tag-free neck, convenient top-to-bottom zipper, and a unique zipper cover to protect your baby's delicate skin while they snooze in the swaddle sleep sack. PREMIUM QUALITY: Designed with three layers of buttery soft fabric, these baby bags are soft and stretchy. Made from breathable fabric, this infant sleep sack is the safest alternative to loose blankets, making them great baby shower gifts! TRENDY STYLE: Elevate your nursery's style with Copper Pearl's Baby Sleep Sack. Made to coordinate perfectly with our other products, flaunt your favorite Copper Pearl prints and patterns, ensuring your baby looks adorable at all times. Introducing the Copper Pearl Sleep Sack, the epitome of comfort, safety, and style for your little one's slumber. Crafted from a premium polyester and rayon blend, our sleep bags boast three layers of buttery soft fabric, providing unparalleled softness and stretch. Designed with baby's comfort in mind, our sleep bags feature ultra-soft, breathable fabric with just the right hint of stretch. You can rest assured that your baby will feel cozy and comfortable, snug as a bug in a rug, without the worry of loose blankets. With a 1.70 Thermal Overall Grade (TOG) rating, our sleep bags offer the ideal warmth for room temperatures between 65 – 75 degrees F. The sleeveless design ensures year-round usability, helping your baby sleep through the night soundly. Generously sized, our 0-6 month sleep bags measure 28 inches in length, with a width of 13 inches under the armpits and 18 inches at the widest section, providing ample room for your growing baby to move comfortably. Featuring a tag-free neck and a convenient top-to-bottom zipper, our sleep bags offer added comfort and ease of use. The wraparound zipper design ensures quick and hassle-free changes, while the unique zipper cover protects your baby's delicate skin. At Copper Pearl, we take pride in creating high-quality products that not only look great but also offer exceptional functionality. Our sleep bags are simple, modern, and guaranteed to elevate any nursery's style, adding a touch of sophistication to your baby's sleep space. Pairing perfectly with our range of Copper Pearl products, our trendy sleep bags flaunt your favorite prints and patterns. Coordinate effortlessly and create a cohesive and stylish nursery aesthetic that reflects your unique taste and style. Invest in Copper Pearl's Sleep Bag today and provide your baby with the ultimate sleep experience – cozy, safe, and stylish. The perfect baby shower gifts for any new parent, our sleep bags are a must-have addition baby essentials.