Smith Session MIPS Bike Helmet Matte Merlot Adult Medium 55–59cm New In Box The Smith Session MIPS is a lightweight all-mountain bike helmet built with MIPS impact protection, Koroyd® zonal coverage, and 15 fixed vents for strong airflow on climbs and descents. Medium size is factory-rated for 55–59 cm head circumference, and the VaporFit dial system allows quick micro-adjustment for a secure fit. Matte Merlot is a less common colorway that stands out well against standard black gear. Condition: New in Box Brand & Model: Smith Session MIPS Colorway: Matte Merlot Size & Fit: Adult Medium – 55–59 cm adjustable fit • Approximate Head Size: Medium adult fit • Retention System: VaporFit dial adjustment Materials: In-mold lightweight shell, Koroyd® impact zones, MIPS liner Keywords: smith session mips helmet, matte merlot bike helmet, smith medium helmet 55 59cm, mountain bike helmet mips, smith cycling helmet new box, adult trail helmet