Segway Kids Helmet XS - Orange Smaller the Size, Bigger the Safety Wholesome Protection for All Scenarios Fits 19.69 - 21.65 inches head circumference. Easy-to-use Adjustable Strap Segway Helmets one-piece molding process creates a uniform, compact helmet with superior ability to absorb and disperse impacts. Leveraging soft, breathable fabric that provide ultimate comfort even with long hours of wear. Liners are detachable and washable which make cleaning and maintaining easy.