Stratus Storm Cell Under Helmet Hat Ski Accessories 38 hours of GPS tracking

38 hours of GPS tracking for long runs and training sessions

this upgraded version takes your trail running and outdoor adventures to new heights

and we’re now proud to present the evolution of the R2v2… the R2 3

If you’re using tech-toe AT boots and you care about uphill efficiency as much as downhill precision

ST Brackets

Stratus Storm Cell Under Helmet Hat Ski Accessories 38 hours of GPS trackingDesigned for high output ski missions, the StormCell Under Helmet Hat delivers warmth and versatility in cold conditions. Made from 100% premium merino wool, it provides lightweight insulation, superior moisture management, and all day comfortwhether you're skinning uphill or charging down. Perfect under a helmet or on its own, this sustainably crafted, biodegradable layer keeps you warm while keeping your impact low.