Crafted from soft, breathable 100% organic cotton muslin, this 0.5 TOG sleep sack is perfect for year-round comfort. Easy-care instructions include hand or machine wash without harsh chemicals and low-heat drying to maintain softness. 100% Organic Cotton: Crafted from 100% organic cotton and featuring four layers of soft cotton gauze, this toddler sleeping sack has a 0.5 TOG rating that delivers warmth while promoting breathability, making it ideal for year-round use. The muslin material is more breathable and softer than knit fabrics Size: Measuring 39 inches in length, this organic cotton baby sleep sack is appropriate for babies aged 2-4 years, with a slight variance due to handmade cutting.