PREMIUM POLYESTER/RAYON BLEND – Boasting three layers of buttery knit fabric for superior softness and stretch, our three-layer sleep bags are designed with baby’s comfort in mind. That’s why we created them with ultra-soft, breathable fabric with just the right hint of stretch. You can feel confident that baby will feel cozy and comfortable snuggled in this special sleep bag as the safest alternative to using loose blankets. These sleep bags are made from the same ultra-soft and stretchy material as our original knit swaddle blankets. WARM AND COZY – Our Sleep Bags have a 1.25 Thermal Overall Grade (TOG) rating ideal for room temperatures between 65 – 75 degrees F and a sleeveless design to offer the perfect amount of warmth for year-round use helping baby sleep through the night. GENEROUS SIZE The 0-6 month size provides a length of 26.5 inches, width of 13 inches under the armpits and 18.5 inches at the widest section of the sleep bag. The 6-12 month size provides a length of 28 inches, width of 14 inches under the armpits and 19 inches at the widest section of the sleep bag. BONUS FEATURES – Our Sleep Bags also feature a comfy, tag-free neck and a convenient top-to-bottom zipper for easy on and off. TRENDY, HIGH QUALITY DESIGNS – At Copper Pearl we pride ourselves on making high quality products that always look great on babies, moms, or in your nursery. Our sleep bags are simple, modern, and sure to elevate any nursery’s style. PAIR PERFECTLY WITH COPPER PEARL PRODUCTS – Our trendy, three-layer sleep bags flaunt your favorite Copper Pearl prints and patterns. They are made to coordinate perfectly with products you already own and love!