This is the O'Neill 24-7 Traveler UPF 30+ Short Sleeve Shirt Breathable Features: UPF 30+ Ultraviolet Protection HyperDry Hydrophobic Technology 4-way stretch Boardshort Connector Maximum Cooling & Breathability Loose Fit 5oz HyperDry + 24-7 Technology Flatlock Stitched Breathable Seams A must have for world travelers and outdoor enthusiasts alike. The ultra breathable cooling of the 24-7 technology provides lightweight protection from extreme heat and fatigue in a relaxed fit. Enjoy your favorite sports and activities in harsh conditions while staying cool and comfortable.