Marcellus Shale Long Sleeve Flame Resistant Shirt. Pennsylvania is the birthplace of commercial oil production and is experiencing a new boom thanks to the Marcellus Shale Formation.
Graphic: Graphic shirts are printed in-house with a non-flammable water-based ink. This type of printing is not as vibrant as plastisol flammable print. Comfortable 100% FR cotton made to be breathable, moisture wicking, skin safe, and lightweight. Wash before wearing.