Calypso Once a Day Sun Protection Lotion with SPF 30

Product Information

Formula conforms to European recommendation for protection against the harmful effects of UVA and UVB rays. The British Association of Dermatologists (BAD) says frequent reapplication of sun cream is important, regardless of how long any product claims to give protection for. A spokesperson added: 'As with all sunscreens, it is important to follow the instructions for application and use; and sunscreen should not be used to intentionally stay longer in the sun. Sunscreen is just one part of a sun safe regime.' Boots What's more, even if you follow all the rules, it's possible you won't get as much as protection as you expect.

Yes, you can - but you’ll also need to reapply frequently, just like you would if you were on the beach staying dry, and immediately after towel drying. A spokesperson said: 'Soltan Once products clearly state how they should be used and when to reapply. We are confident in the claims for the Soltan Once range and refute the suggestion that they are misleading. Sweating, swimming, towel drying, or rubbing your skin on an abrasive surface can all impact protection levels and how the sunscreen lasts. All of this means you’ll almost certainly need to apply more than just ‘once a day’, especially if you're out and about. Apply a generous amount of sun cream - around one teaspoon per body part - at least 15 minutes before you go into the sun so it soaks in.

SPF stands for Sun Protection Factor and represents the sunscreen’s ability to protect your skin from the sun’s rays in addition to your skin’s natural protection. Depending on your skin type, hair colour, eye colour and location, you may be able to stay in the sun for 10 minutes without burning. Apply evenly and generously to all exposed areas 15 minutes before sun exposure to the sun, rubbing in well to allow the product to bind with the skin and form a protective film against UVA and UVB rays

We asked Boots a series of questions about its Once sun cream range and asked it to respond to our concerns about 'once a day' claims.And after that, he adds, re-apply at least every two hours - and immediately after swimming, sweating or towel drying. Apply evenly and generously, smooth in gently. We recommend a minimum quantity of 35ml for all over body protection.

People can still use these types of sunscreens, but you should treat them like any other sunscreen, and reapply regularly,' he said. Professor Brian Diffey recommends applying sun cream like you would paint to a wall - you'd rarely just do one coat. Two coats of paint are almost always required for satisfactory coverage. In the same way two coats of sunscreen may be required for adequate protection,' he said. Professor Brian Diffey adds that sun creams generally offer ‘very good’ water resistance these days (though be aware water resistance claims also come with caveats, and the products we tested didn't hold up well to real-life conditions in our 2016 investigation), which is good if you're planning on spending time in the pool or in the sea. But over the course of the day swimming will wash away some of the protection. Important: Read the instructions carefully before use. Apply to clean dry skin, preferably after a shower. Apply evenly and generously 15 minutes before exposure to the sun, which will allow the product to bind with the skin and form a protective film against UVA/UVB rays. When used correctly, one application is sufficient for all day protection. They were allowed to wear t-shirts and sit on a chair (we did this because if you lie on a sun lounger or towel, get sandy, or wear a t-shirt on holiday it’s possible your single-use sunscreen could be rubbed off over time).Professor Brian Diffey, of BAD, says: 'We recommend against relying on any sunscreen product for long periods without reapplication, whether advertised as an extended wear product, or not. In 2016 Which? put several once-a-day sunscreens to the test, investigating how long they lasted on volunteers in a controlled lab experiment, and found they didn't offer nearly as much protection as claimed. Use in the water - Calypso warns that even ‘water-resistant Once A Day sunscreens’ can still be washed off if you spend a long time in the water, or if you dry yourself with a towel. They tend to be more expensive than standard sunscreen and claim to offer high and long lasting protection, usually by forming a more resistant film on the skin than standard sun cream.