Designed for high energy outdoor adventures, our Thermasilk Series is engineered to stretch and move with you for your various active lifestyles. From climbing up to the snowiest peaks to early morning runs in the city, these garments are enhanced with ClimaSense thermal regulation technology to enhance your comfort. Terramar's Thermasilk line has high loft grid channels to create an ideal microclimate that efficiently traps air and effectively allows circulation. The grid construction was created to trap air for added warmth between layers and transport moisture. Each product has a smooth face fleeced back, easy layering, sustainable, quick drying, moisture management and UPF protection.