Ultra-Breathable and Lightweight 4-Season Customer Favorite The Echo Hoodie is built from ultralight bluesign®-approved recycled materials, perfect for everything from fall running and spring ski touring to summer hiking and winter base layers. The Echo is made from lightweight and breathable fabric infused with UPF 15 sun protection and ActiveFresh™ odor control technology, protecting from UV rays and perfect for extended trips into the backcountry. AirVent™ technology delivers superb airflow and moisture management during extra warm days on trail, and the flat-seam construction and reflective logo ensure next-to-skin comfort for layering and add visibility in low-light conditions. Thumb holes near the sleeve cuffs keeps the sleeves where you want them while adding layers or reaching for the next hold. Truly an all-around essential and perennial OR customer favorite, the Echo Hoodie is a do-it-all piece base layer for 4-season use in any environment.