Organic baby knotted hat is a newborn necessity. The lightweight organic jersey will keep your baby comfy and cozy all year round. • Made of 100% organic cotton fabric • Fits snuggly to keep a baby's head warm • Sustainably and ethically produced with eco-friendly AZO / heavy metal free water-based dyes • Naturally hypoallergenic • Certified organic cotton • Style #205-15 SIZING NB - average age 0-3M XS/S - average age 3-6M M/L - average age 6-12M