LANACare Certified-Organic Merino Wool Balaclava/Riding Hat Made of soothingly soft KbT, GOTS, IVN Best Certified Organic Merino Wool. Single layer felted wool. Fits easily under helmet, or can be worn alone. Natural fibers breathe to maintain comfortable temperature against skin. Natural wool with lanolin gives self-cleansing properties for easy care. Minimizes need for washing. For best results, wash by hand with lanolin-containing woolwash to retain self-cleansing properties. European size corresponds to height in centimeters. Choose size by age range or full height (1 inch = 2.5 cm).