Oahu's Koolau Mountains are lush and stunning as they rise from sea level to over 3,000 feet. A great place for an outdoorsy island adventure, their natural beauty reminds us to Take Care of the Land so that the generations to come will also be able to enjoy it. Made using our exclusive specialty dyeing process that uses real volcanic ash and features 100% combed ring-spun cotton, this t-shirt has 50+ SPF protection to keep you feeling cool, calm, and protected all year long. We only use environmentally friendly, water-based inks that penetrate the material's fiber resulting in more vibrant colors, a softer feel, and artwork that doesn't crack or peel. Plus, it is proudly printed in the United States for quality you can see and designs that stand the test of time.