Product description item: Sun Reactive
• The D.D.Step | SUN REACTIVE shoes react to UV light, the transformation begins when there is a strong UV source.
The skin / fabric is treated with a sun-sensitive material. The colors turn white indoors and change color when exposed to sunlight. Once the shoes are back indoors, they will be white again. The color changes depending on whether they are in the shade or the sun. The D.D.Step | SUN REACTIVE shoes do not store UV light. No matter how long or how much UV light it has been exposed to, the shoe will turn white once the UV source is gone.