The Y10 is a true youth-specific helmet engineered exclusively for young riders. Featuring a dedicated youth shell, lightweight polycarbonate construction, and youth-focused ergonomics, it is designed to deliver a secure fit, dependable protection, and lasting comfort. With efficient ventilation, UV-protective shield performance, a removable and washable OEKO-TEX certified interior, emergency quick-release cheek pads, and a traditional double D-ring system, the Y10 brings together safety, comfort, and practicality for the next generation of riders. Advanced Polycarbonate Composite Shell (ACS): Wind tunnel-tested, Lightweight, superior fit and enhanced comfort "ACS" Advanced Channeling Ventilation System: Full front-to-back airflow flushes heat and humidity up and out. Pinlock Ready HJ-50 Visor: Provides 99% UV protection, Anti-Scratch coated. DISTORTION FREE VISOR (SHIELD) Interior provides enhanced moisture wicking and quick drying function. Crown and Cheek pads: Removable and washable. Cheek pads: interchangeable throughout all sizes Universal BT Compatible YOUTH HELMETS Size Head Circumference Hat Size Small 19.29 - 19.69in (49 - 50cm) 6-1/8 - 6-1/4 Medium 20.1 - 20.5in (51 - 52cm) 6-3/8 - 6-1/2 Large 20.9 - 21.3in (53 - 54cm) 6-5/8 - 6-3/4 X-Large 21.65 - 22.05in (55 - 56cm) 6-7/8 - 7