A flame-resistant t-shirt? Yes, Carhartt makes that. This men's flame-resistant short-sleeve tee is made of 6.5-ounce fire-resistant knit; that's a blend of 55-percent modacrylic and 45-percent cotton. It is NFPA 70E compliant and HRC 2.
The shirt has side-seam construction to prevent twisting and giving this t-shirt a more comfortable fit.