GloWear 8283BK Lightweight Performance Hi-Vis T-Shirt is a Type R Class 2 shirt designed for enhanced visibility and breathable comfort in the heat. With an extra-soft, jersey-like feel, this 100 percent polyester fabric is Ergodyne's lightest weight, ANSI/ISEA 107-2020 compliant fabric. Reflective safety shirt features a moisture-wicking treatment and underarm vents to keep wearers cool and dry. It is rated to 30+ UPF for protection against the sun's harmful UV rays. Black panel across the bottom hides dirt, grit and dust to keep the shirt looking cleaner longer. Black vented underarm panels hide sweat and improve breathability. 2" reflective tape provides enhanced visibility at night or in low-light conditions. Unlike solid reflective tape, the flexibility of segmented tape allows reflective clothing to feel more comfortable, lightweight and breathable. Machine-washable shirt also features a chest pocket. It fits chests up to 44" in diameter. Center back is 29" long.