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.