RUNNING JACKETSIZE: ONE SIZERECOMMENDED CHEST SIZE: 80 - 120 cmMATERIAL COMPOSITION: 100% NYLON / 100% POLYESTER / 95% POLYESTER, 5% ELASTANESPECIFICATION:- REFLECTIVE ELEMENTS- WHISTLE- AIRWAY- H2O SYSTEM- WATER BAG COVER- EXTRA STRAPS FOR RUNNING POLES