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% recycled polyester 25% organic ring spun cotton 25% modal25% recycled polyester 25% polyester 25% organic ring spun cotton 25% modal (Aluminum Grey) 1x1 rib knit binding at neck and armholes Side seams Recycled tear-away labelA C-FREE ProductWe 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.