As a geo enthusiast, this shirt design showcases that installing a single geothermal unit is the environmental equivalent of planting 750 trees! The Gildan 2000 Prairie Dust shirt is made from high-quality 6.1-ounce, 100% US cotton. It also features a seamless double-needle 7/8" collar for added comfort and double-needle sleeves and hem for extra durability to ensure you get the best fit possible!