Our top-knot hats are made from the same all-natural silky soft bamboo as our rompers. Mix and match colors to suit your style. Natural temperature control of bamboo is perfect for those first days home from the hospital, and for keeping the wind out of their ears on your outings❤️ • Sizing 0-6 months: 13 inch/33cm (fits head circumference up to 16-inch head circumference • Breathable material for ultimate comfort • Gentle on sensitive skin • Comfortable stretch Machine wash cold, tumble dry low