Fox racing altitude mtb jerseyfox racings altitude mtb jersey has a 4 way stretch main body for freedom of movement blended with trudri moisture wicking fabric to keep you dry the chest zip allows for extra ventilation while reflective details aid visibility in low light conditions if you need to be somewhere that will require id or a pass you have a handy stash pocket to keep it in featurestrudri moisture wicking fabric4 way stretch main bodytaped chest zip detailreflective detailsidlift