A simple refrain but one of our favorite truths. Keeping plastic waste out of our ocean starts with using less of it. Klean t-shirts are made of 100% recycled materials. Upcycled cotton, recycled plastic bottles and cool art are the only ingredients in these soft, easy-wearing shirts. Throw some Klean into your rotation! NOTE: all clothing sales finals, no returns or exchanges. Click to see men's sizing chart or women's sizing chart.