It can be tricky to nail the perfect balance of sun exposure to ensure you get your fill of vitamin D but don’t get burned. SunFriend is a handy wristband with a gallium nitride UV sensor that detects the amount of UVA and UVB hitting your wrist and warns you when it’s time to go inside or cover up.
SunFriend has 11 skin sensitivity settings so you can customise it to your skin type. And, because it goes where you do, it senses all the UV that hits your skin including the rays bouncing off reflective surfaces like snow or…
