The Outdoor Research ActiveIce Spectrum Sun Hoodie provides UPF 50+ sun protection and self-cooling ActiveIce technology combine to dynamically regulate body temperature during active outdoor use. Best-selling ActiveIce 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. Includes thumbloops. Perfect for use in intense sun on land and water.