Molis & co sleeping bags are fitted with ZIP PROTECTORS to prevent chafing and a TWO-WAY ZIPPER. Easy to place baby in sack! Use top ziper pull to open from top. Our sleeping bag's Wide bell-shaped bottom provides ample room for movement of baby's legs and ensures proper hip development. Easy diaper changes! Use bottom zepper pull to open at foot of sack without exposing baby's chest to cool air. LARGE-SIZED: 18-36 months (35.8"). Our baby sleeping bag is bigger than regular 18-24 month sleeping bag. There's plenty of room for baby to kick and move his/her leg around. PREMIUM SUPER SOFT MUSLIN FABRIC: molis&co sleeping bags are made from specially selected, pre-washed muslin. The outer shell, which consists of bamboo (70%) and cotton (30%), is SILKY SOFT TO THE TOUCH, making it ideal for delicate baby skin. The muslin is also HIGHLY BREATHABLE and softens after every wash, guaranteeing a DURABLE, HIGH-QUALITY PRODUCT. This product is filled with polyester. SAFETY AND COMFORT: Replaces loose blankets for safer sleeping. Additionally, they are fitted with ZIP PROTECTORS to prevent chafing and a TWO-WAY ZIP makes nappy changing easier. WE ARE BAMBOO FANS.The bamboo plant has MINIMAL ENVIRONMENTAL IMPACT . It is an excellent THERMOREGULATING FABRIC and provides a feeling of freshness in summer and warmth in winter. EASY CARE: MACHINE WASHABLE (40º), TUMBLE DRY at low temperatures. SIZES AVAILABLE:0-6months(S), 6-12 months(M), 12-18 months(L) and 18-36 months(XL).