i XS Trigger X 2. 0 MIPS 3/4 Shell Helmet Open-face freedom The i XS Trigger X 2. 0 MIPS sits in its own category: open-face ventilation and freedom paired with the extended rear and side protection you'd expect from a full-face helmet. The patented SLAPGUARDS extended side coverage uses an open-ear design that doesn't trap heat or muffle sound, while internal and external ventilation channels keep airflow constant on the longest, hottest trail days. MIPS brain protection is integrated throughout, and the Ergo Fit 180deg retention system allows precise two-way horizontal and vertical fit adjustment on the fly. A multi-position goggle-compatible visor and magnetic buckle round out a helmet that covers more ground than its open-face profile suggests. Features SLAPGUARDS extended side protection with an open-ear design increases rear and side coverage without restricting hearing or adding heat buildup Mips brain protection system minimizes rotational forces during certain impacts for advanced safety Double in-mold construction with 360deg in-mold shell for a lightweight, structurally integrated design Internal and external ventilation channels maintain constant airflow for cooling even on sustained efforts in hot conditions Ergo Fit 180deg retention system provides precise two-way horizontal and vertical fit adjustment, adjustable even while riding Adjustable, goggle-compatible visor with multi-position adjustment for adaptable sun and trail coverage Magnetic buckle closure for quick, one-handed use even with gloves on SPECIFICATIONSConstruction Double in-mold, 360deg in-mold shell Rotational Protection Mips Extended Coverage SLAPGUARDS open-ear side protection Fit System Ergo Fit 180deg with horizontal and vertical adjustment Closure Magnetic buckle Visor Adjustable, goggle compatible Certifications EN 1078, CPSCIntended Use Trail, Enduro, All-Mountain Sizing Size Small Medium Large Head Circumference (in)20 7/8 - 22"22 - 23 1/4"23 1/4 - 24 3/8"Head Circumference (cm)53 - 56cm56 - 59cm59 - 62cm | Ixs | Trigger X 2. 0 Mips 3/4-Shell Helmet Men's | Size Small In Chalk