EU Men's Compression Tights Running Shorts Base Layer Under 85% Polyester/15% Spandex.Machine Wash If you prefer a looser fit, go up a size Package include: pack of 1 Tag is Asian size, find your size in our size chart before you order, if you prefer loose fit, go up a size Elastic waistband: Excellent stretch, label on the outside Lightweight: (0.27lb) like your second skin, great breathable keep you cool Flat lock seams to prevent friction, good crease resistance, not easy to deformation