tentree Portal Tee. This t-shirt is Cradle to Cradle Certifiedâ¢, which means everything it's made up of breaks back down â leaving behind no waste. More than that, it certifies that it's made using renewable energy and without harmful chemicals. Screened graphics at center front. Crew neckline. Short sleeves. Woven loop label at front right hem. 100% organic cotton. Machine wash. Imported.