Outdoor Research Men’s ActiveIce Spectrum Sun T-Shirt size Large color Naval Blue 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. A special additive drives this cooling process via phase changes, which keeps the wicking, breathable, and quick drying ActiveIce™ technology the ideal solution for anyone who spends serious time in hot, sweaty, sun-baked conditions. FABRIC PERFORMANCE Lightweight Quick Drying Wicking Breathable ActiveIce™ Cooling Movement-Mirroring Stretch UPF 50+ DESIGN FEATURES Flat-Seam Construction Interior Center Back Locker Loop Chafe-Free Design