Giro Manifest Spherical Bike Helmet Size:Medium as they are engineered to

as they are engineered to accommodate both Alpine ISO 5355 and GripWalk ISO 23223 soles

For those of you starting early in the morning or staying up late for moonlight adventures

Easy adjustment

The high-flow cap provides effortless hydration with no squeezing required

Giro Manifest Spherical Bike Helmet Size:Medium as they are engineered toWith Spherical Technology, best in class ventilation, deep coverage and luxurious comfort, Manifest is the most premium trail riding helmet available. Among the Manifest's extraordinary features is Spherical Technology, which utilizes a ball and socket design powered by Mips, the market leading brain protection system that helps to reduce rotational forces. Spherical Technology allows the outer liner to rotate around the inner liner during a crash and