Keep baby safe and warm all night long with this practical muslin sleep sack! Designed specifically for bedtime and naptime, this cozy and smart sleep sack can't be kicked off - meaning more restful sleep for baby. Made with soft, breathable fabric, it features a sleeveless design that's perfect for the spring and summer months. Features:-Double-layer muslin -Soft and breathable fabric -High-quality fabric and two-way zipper-0.5 TOG (Overall Thermal Rating) -Naturally breathable fabric keeps baby comfortable Two-way YKK zipper -High-quality YKK zipper with two zipper pulls -Size and care label is printed on the inside of the garment so there's no need for an itchy woven label -High-quality trims and thoughtful design -This garment has been designed with the best for your baby-High-quality branded zipper pulls and soft, oversized zipper guards-Recommended care instructions: turn inside out, machine wash with like colors, air dry, do not bleach, do not dry clean, do not iron Machine wash on gentle cycle; air dry Size Chart:3-12 months = Small; 25-30"; 17.5-24 lb12-24 months = Large; 30-35"; 22-29 lb