SPF stands for Sun Protection Factor and it is a measure of how well sunscreen will protect skin from UVB rays. A higher SPF factor means you can spend longer in the sun without getting burnt, as the UVB filters will protect you. UVA light is the type that causes fine lines and wrinkles, you'll need a sunscreen labelled broad spectrum to protect your skin from both types of damaging light.

Sun cream in the UK has a small icon shaped like an open jar printed on it here is where you will find the expiry date – it's usually 12 months from opening. Check yours when you purchase and make a note on the date. Sun cream will degrade and become less effective if it's used after the expiry.

There are two different types of sunscreens, the first is known as chemical sunscreen, these formulas include chemical active ingredients like homosalate and avobenzone and work by absorbing UV light when it hits the skin. The second type, known as physical or mineral sunscreens, uses ingredients like zinc oxide and titanium dioxide and works by reflecting UV light away from the skin. Some SPF formulas contain a mix of both chemical and physical ingredients.

A higher SPF offers better protection from the sun's damaging rays. Generally, SPF 15 is seen as low protection, 15-30 is medium, like our Rénergie SPF 20 Cream and 30+ is high. Your choice of protection will depend on the intensity of the sunlight and your skin type. Our Teint Idole Ultra Wear, Absolue Premium and Hydra Zen ranges all have options which include SPF.

Generally, sunscreen should be reapplied every 2 hours. Make sure you choose a sun protection product that offers broad spectrum protection as this means your skin will be protected from both UVA and UVB rays.