Show your pride in America's public lands with your own "Only You Can Prevent Dumpster Fires" unisex T-shirt. FREE SHIPPING.. • 100% combed and ring-spun cotton (Heather colors contain polyester) • Pre-shrunk fabric • Side-seamed construction • Shoulder-to-shoulder taping Disclaimer: The fabric is slightly sheer and may appear see-through, especially in lighter colors or under certain lighting conditions.