Fit: looseThe 4-way stretch material moves better in every directionThe material wicks sweat and dries very quicklyReflective details for better visibility during low-light runsEnhanced laser perforations on the front and back for better airflowLightweight Iso-Chill fabric helps dissipate body heat, keeping it cool to the touchUPF 30 protects your skin from harmful sun raysHem with side openings