West Biking Men Bicycle Capri Pro Tour Cycling Knicker Padded MTB Road Bike Shorts with Key Chains Polyester+Spandex Soft nylon 80% and 20% spandex tricot fabric.Reflective Design. These Capri's will last as a high performance garment for your active needs. Suit for Road and Mountain bike Cycling. Super Breathable and Very Cool in Hot Summer.Sweat-wicking, Anatomically Shaped,Super Smooth. M-(Height: 5.4-5.65', Weight: 116-143LB),L-(Height: 5.5-5.77', Weight: 143-160LB),XL-(Height: 5.65-5.9', Weight: 160-180LB),XXL-(Height: 5.75-6', Weight: 180-200LB),XXXL-(Height: 5.85-6.15', Weight: 200-215LB) Anatomically Shaped The spandex support increases blood flow through the muscles resulting in increased oxygen and less fatigue.