Louis Garneau Size Guide. The Zappa Mountain Bike Shorts have the performance you need for the trail and the versatility you need for the post-ride meet-up. Dura-X shell: Lightweight, abrasion-resistant fabric. Stretch weave for improved mobility. Stain- and dirt-resistant Dirtmax tech. Drytex® 2002 lining: Snap-out inner shorts feature an attached chamois. Mesh design offers improved breathability. Moisture-wicking performance sweeps energy-sapping perspiration away from the skin. Silicone gripper at hem keeps leg in place. Silvercool3 Chamois: Multi-thickness, high-density foam for targeted support. Body-conforming, ergonomic construction. Two-way stretch. COOLMAX® top layer for improved moisture-wicking performance. Seamless inner leg reduces friction caused by bunching. Semi-fitted waist with wide belt loops and elastic back panel. Zip fly with hook-and-loop closure. Hook-and-loop hand pockets. Vertical zip cargo pockets with mesh panels for heat dissipation. Hook-and-loop tabs at the cuffs. Body: 96% nylon, 4% spandex;. Mesh: 76% polyester, 24% spandex;. Chamois Outer: 95% COOLMAX, 5% spandex;. Chamois Foam: 100% polyurethane;. Chamois Back: 100% polyester. Hand wash and line dry. Product measurements were taken using size SM, inseam 10. Please note that measurements may vary by size. Measurements: Waist Measurement: 28 in. Outseam: 18 in. Inseam: 10 in. Front Rise: 7 in. Back Rise: 15 in. Leg Opening: 20 in. Color: black