Inspired by the convergence of the Cascade and Sierra ranges just east of Klean HQ. We believe there is adventure to be had in every backyard, it’s just a matter of finding 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.