Razor line's long-sleeve running men's shirt 833106/465950 Curacao/Blue/Black A must for every serious läufer. Reflective design on the back and sleeves Superior ventilation and the best possible cooling due to mesh inserts MP3 pocket on the upper arm with zip and headphone loop on collar Concealed zip with chin guard for comfortable wearing Material: 88% polyester, 12% elastane Inserts: 90% Polyester, 10% elastane