Under Armour says its new Coldblack technology makes dark-colored fabrics perform like light colors, and makes light colors perform like nothing else. The fabric in its new Abyss Guide long-sleeve shirt reflects heat and UV rays for a cooler, comfortable feeling. The quick-dry shirts also feature UPF 30-plus sun protection, mesh back panels for ventilation, chest cargo pockets and a zippered, side-entry chest pocket. Available in deepwater (black) and mirror (blue,) and in sizes S to XXL, the shirts cost $119.99. A long-sleeve knit version costs $79.99. Call 888‑727‑6687 or visit underarmour.com.