Comes with a removable inner fleece padding for a perfect fit that adapts as children grow, along with an LED light and a magnetic buckle.
Micro Helmet Sizing Chart:
Extra Small: 46 - 50 cm (about 18.1 to 19.6 inches)
Small: 48 - 53 cm (about 18.9 to 20.8 inches)
Medium: 52 - 56 cm (about 20.4 to 22 inches)
Complies with U.S. CPSC regulations—passes CFR Title 16.