LANACARE Certified-Organic Merino Wool Baby Cap Made of soothingly soft KbT, GOTS, IVN Best Certified Organic Merino Wool. Fits snugly to protect tender ears from wind. Soft woolen ties. Natural fibers breathe for comfort in warmth or cold. Absorbs moisture, remains warm even when wet. Natural wool with lanolin gives self-cleansing properties, to minimize need for washing. For best results, wash by hand with lanolin-containing woolwash to retain hygienic properties. Choose size based on your baby's full length. European size corresponds to baby's length in centimeters. 1 inch = 2.5 cm. Age in months is estimate.