The ion helium short sleeve jersey is made with a lightweight and breathable material with a wicking finish and ion39s sanitized technology which is a certified antimicrobial material treatment which avoids bad odour caused from working up a sweat this ion jersey is ideal for you freeriders with a loose and comfy fit and dries ultra fast keeping you fresh at all times the ion helium jersey comes with plenty of handy little features such as the small ticket pocket and cle