Made by 23rd Day. Sustainable materials-Each shirt uses 6 recycled water bottles and all fabric is spun, knitted, processed and finished in the USA. UNISEX and lightweight. These sustainable fibers (50% up-cycled polyester from recycled plastic; 25% organic, US grown cotton and 25% super soft TENCEL™ Modal) combine to create a soft, flexible, and smooth fabric which hold a great print.