&Nbsp; 7oz fire resistant treated cotton durable metal buttons chest pockets with flaps meets the requirement of ASTM 1506 model #FS7-KHK-L size: Large the Black Stallion flame-resistant cotton work shirt is great to wear under a welding jacket for secondary protection. It can also be used alone when very light welding is needed. Buttoned pockets protect against sparks that can land and ignite.&Nbsp; warning: this product can expose you to chemicals which is [are] known to the state of california to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.Offers contrastgov.