Ergodyne - EGO21583 Made of polyester, breathable knit, the 8091 Non-Certified Hi-Vis Long Sleeve T-Shirt provides full-core body and arm coverage while on the job. Fluorescent colors provide safety and protection in low-light conditions. Moisture-wicking material keeps you dry by absorbing sweat so you can work without the uncomfortable feeling of moisture sticking to your clothing. T-shirt protects you from sun damage with 30 plus UPF feature. Store small items in the outside chest pocket so you can easily grab your tools.