Bell Sports Disney Frozen Youth Child Hardshell Multi Sport 3D Safety Helmet Cooling Vents Removable Tiara Blue Youth Child 5-8 Multisports helmet with removable tiara from Bell Sports, Inc.n; Hardshell construction with keep cool vents. Complies with U.S. CPSC safety standards for bicycle helmets for person's aged 5 and older and Designed for use in skateboarding and trick roller skating and meets ASTM F1492-08 standards. For ages 5 and up. Fits head sized 20" - 21 1/4" or 51-54 cm. This high quality helmet was built to protect - the stunning and beautiful graphics that include Elsa, Anna and Olaf are just a nice bonus that your child is sure to love! No helmet can protect from all head injuries. For maximum protection, read the included owner's manual to ensure the helmet is fitted and adjusted properly to fit your child's head.