Interesting product !
The Glytone UV Sunband simply helps to monitor UV exposure by changing color to reflect the level of exposure to the sun. Apply sunscreen over all areas of exposed skin and over the band. When exposed to the sunlight, the band turns bright purple to indicate it has been activated. When the band fades to light pink, it is recommended to reapply sunscreen on the body and on the band.
Shop at : skinstore.com