The effectiveness of Sunfriend wristband sensors based on NASA inspired by measuring the ultraviolet (UV) radiation from the sun (direct radiation or reflected) on the skin.

With a simple indicator , efficient and a warning by flashing the Sunfriend strap indicates the holder when not only must put sunscreen or shelter from the sun , but also reports of ' adequate daily intake of vitamin D.

.

Technical specifications :

- Warning by flashing when the skin needs protection

- Light gauge to 11 levels

- Suitable for all skin types

- Waterproof and durable

- Use daily