Giro Helios Spherical Helmet hardshell Our fan-favorite sock technologies aren't

Our fan-favorite sock technologies aren't going anywhere-offering you the comfort and performance you expect from Smartwool

a 34mm diameter spool

X2P double bolt locking mechanism for added security

Pocket Lining:          75D 660 g/m² 100% recycled polyester taffeta

•    Designed for the gym and outdoor sport climbing

Giro Helios Spherical Helmet hardshell Our fan-favorite sock technologies aren'tThe heart of the Helios's extraordinary design and performance is Spherical Technology, which utilizes a ball and socket design powered by Mips, the market leading brain protection system that can help to reduce rotational forces. Spherical Technology allows the helmet's outer liner to rotate around the inner liner during a crash, and also allows Progressive Layering of the inner and outer liners to provide more comprehensive protection and