Arc Rated FR Long Sleeved T-Shirt. Made with inherently flame resistant fabric with a composition of 55% Modacrylic and 45% cotton. ATP Value: 10.4. Made in Canada. Sizing Information: (X-Small 30"-32"), (Small 34"-36"), (Medium 38"-40"), (Large 42"-44"), (X-Large 46"-48"), (XX-Large 50"-52"), (XXX-Large 54"-56"), (XXXX-Large 58"-60") Available in Tall sizes too.