Features of the Pearl Izumi Men's Interval Short Elite transfer In-R-Cool fabric powered by coldblack provides superior cooling and reflective sun protection Lightweight fabric Uses 34% Lycra for muscle hugging stretch and compression Elite Escape 1:1 Chamois with floating top-sheet design reduces friction for all day comfort Laser cut leg openings with silicone leg grippers for a seamless transition to skin BioViz reflective elements for low-light visibility Fabric Details Main body: 66% Nylon, 34% Lycra Elastane Lower leg: 65% Nylon, 35% Lycra Elastane