Feel your impact in this crazy-soft sustainable muscle tank that has had its total carbon footprint neutralized through Carbonfree certification and uses an equivalent of up to 6 recycled plastic water bottles. 4.2-ounce, 50% recycled polyester/25% organic ring spun cotton/25% modal, 30 singles 1×1 rib knit neck Back neck taping Relaxed fit 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.