The Circadian Collection is built for moving fast and light along the trail. These lined shorts are all about that. The outer shorts are made from a lightweight fabric with a healthy dose of stretch to enable full freedom of movement without unnecessary grams. The inner shorts are made from durable stretch nylon for comfort and longevity. Durable FlashDry™ HD technology that wicks away sweat and dries quickly, helping to regulate your temperature which allows your body to perform at its best when hitting the trail.