Lining material: 100% Cotton(breathable); To prevent baby's delicate skin from UV and sun Size: Hat circumference about 44cm(Fit for infant Less than 3 months), Hat circumference about 46cm(Fit for babies 3-6 months); Hat circumference about 48cm(Fit for babies 6-12 months); Hat circumference about 50cm(Fit for babies 12-24 months) Tips: The age matching size of baby hat is only for your reference, please choose the size according to your baby's actual head circumference(generally plus 1.5cm) Lightweight and foldable; Casual style for sunny days and serves the purpose of sun protection when going out or traveling, Best choice for Parents! Hand washed recommended, dry it tiling; Please feel free to contact us if you have any question, we will give service all the time! Features: 1. Material: Made of high quality Sweat-absorbent cotton material, Sweat-absorbent soft lining, comfortable to wear. 2. Comfortable: Skin-friendly breathable cotton fabric for the comfort and health of the small head. 3. Detail: Lightweight, easy to carry. Package includes: 1 * Hat only Tips: 1. The color of the hat may be a little different from the pictures showed on the purchasing page due to the lighting when the pictures were shot. 2. The size may exist 1-2cm measurement error due to the size measured by hand.