Del Sol is all about changing it up and having fun in the sun with their clothing and accessories that change colors, in seconds, with sunlight and then back to their original colors without sunlight. All Del Sol color-changing products come with a lifetime guarantee and are Sol Smart™, as they encourage sun-safe action based on their color-change intensity. Del Sol's proprietary Spectrachrome® technology, originally explored by NASA, harnesses the power of the sun to reveal each product's hidden colors. Just Add Sun™ and watch the colors appear!