Self-cooling technology that dynamically adjusts to your body temperature, making overheating a thing of the past. This shirt has the highest level of UPF 50+ sun protection so you can start feeling cooler for longer today.Best-selling ActiveIce(TM) technology works more efficiently and effectively than ever before. Our proprietary self-cooling technology now reacts to increases in your body temperature by dynamically cooling you faster when you need it most. A special additive drives this cooling process via phase changes, which keeps the wicking, breathable, and quick drying ActiveIce(TM) technology the ideal solution for anyone who spends serious time in hot, sweaty, sun-baked conditions.SpecsPRODUCT :#287633FABRIC :94% Polyester, 6% SpandexCENTER BACK LENGTH :28inWEIGHT :6.2oz/176gFeaturesFABRIC PERFORMANCELightweightQuick DryingWickingBreathableActiveIce(TM) CoolingMovement-Mirroring StretchUPF 50+DESIGN FEATURESFlat-Seam ConstructionInterior Center Back Locker LoopChafe-Free Design with Dynamic ReachThumb HolesORIGINIndonesia