Feel your impact in this crazy-soft sustainable tank that uses an equivalent of up to 6 recycled plastic water bottles. 4.2-ounce, 50% polyester from recycled plastic bottles/25% ring spun organic cotton/25% modal, 30 singles 1x1 rib knit binding at neck and armholes Side seams Recycled tear-away label A C-FREE ™ Product We start by reducing the product's impact by switching to at least 50% preferred materials. We then neutralize the total carbon footprint of each product in the C-FREE program--from the product's initial raw materials to its end-of-life--through Carbonfree ® certification. This certification purchases third-party, verified carbon offsets through Carbonfund.org.