I'Z FRONTIER Stretch Short Sleeve Polo Shirt 516 Color 20, 2 pieces, M size Color 20 Smoke Gray, set of 2. This is the color in the first image. Other sizes → #516ww A high-performance model that achieved high scores in various quality data. It also has moderate breathability due to its exquisite material structure, which is an arrangement of waffle knit. Uses special异形断面糸 (irregular cross-section yarn). Features a smooth, dry, powder touch due to its excellent water absorption and quick-drying function, which far exceeds general standards. Excellent stretch performance boasting elongation of approximately 30% vertically and 33% horizontally, and recovery rate (after 1 hour) of approximately 95% vertically and 96% horizontally. It also has excellent dimensional stability. The cotton-like soft texture, along with high strength such as bursting strength (429kPa), pilling resistance (Grade 5), and snag resistance (Grade 4.5 or higher), results in a highly complete garment. Excellent UV cut effect boasting a shielding rate of 97.6% / UPF40.