Inner short Matter :82% Nylon 18% Elastane Weight : 110 g • 2 pockets on the sides for the phone or MP3 • Reflective marking • Grip tape at the thigh for better support Short Matter :100% Polyester Weight : 65 g • Ultra light • Tightening lace at the waist • Pockets communicating with the inner short's one • Breathable on the sides • Reflective marking • Compression pocket at the back • Passage for MP3 wires on the back pocket