100% cotton muslin Imported Cozy Double Layer - All-Season Comfort: Embrace the year-round comfort for your little one with a double-layer Muslin sleep sack. The elegant solid exterior and the delightful twig pattern interior not only create a stylish sanctuary in your nursery but also provide a breathable and tender cocoon for your baby's peaceful rest Effortless Diaper Changes - Undisturbed Ease: Relax knowing your baby is snug in a sleep sack that combines the convenience of a two-way YKK zipper for easy diaper changes with the ease of shoulder snaps for quick and hassle-free dressing. This smart design ensures that you can attend to your baby's needs without disrupting their peaceful rest, making it an essential addition to your nursery. Spacious Bottom for Playful Movement: Designed for infants aged 3 to 9 months, this size S baby sleep sack for 3-6 months offers an extra-wide bottom, providing ample space for your baby to play and explore. The spacious design, combined with the soft, lightweight Muslin fabric, promotes both discovery and a restful night's sleep in your nursery. Temperature Control for Year-Round Use: With a 0.7 TOG rating, this Muslin sleep sack is meticulously designed for optimal temperature regulation, keeping your baby cozy in the cold and cool in the warmth. The natural Muslin fabric breathes with your baby, delivering consistent coziness year-round. Machine Washable - Softness Guaranteed: Experience the convenience of a machine-washable Muslin sleep sack that retains its softness wash after wash. The neutral hues and subtle design of this sleep sack seamlessly blend with any nursery's aesthetic, making it an ideal choice for new parents or a cherished baby shower present. lulumoon Sleep Sack Muslin for Baby: Cotton Wearable Blanket for 3-9 Months - Soft Lightweight Ideal for Nursery Lounge Nighttime Naptime 3-6 Months