Made from a flame resistant twill that's 90% pima cotton and 10% 240 gram high tenacity nylon, this navy shirt will keep you safe. Pima cotton is fine, soft, and strong, while the high-tenacity nylon adds abrasion resistance and more strength. It's macho and soft in the same fabric. To ensure your protection, Wolverine double dips the flame resistant shirt in their flame resistant treatment to guarantee flame resistance for the useful life of the garment. For additional functionality, this also comes with a button down collar to keep things tidy, and there are two chest flap pockets with button through closure. A longer shirt tail helps keep your back protected when bending over. It's HRC 2 with an arc rating of ATPV 8. Plus it meets the following safety standards: NFPA 70E-2004, NFPA 2112-2012, ASTMF 1506-2010a, and OSHN 29 CFR 1910.269. Material: Cotton, Nylon.