How to use

How should Altruist Invisible Spray be used?

If you spray and wait for it to dry, then you’ll need to apply a couple of times to ensure complete coverage. Generally, we’d recommend rubbing it in. Don’t forget...

What about spray sunscreens?

There is some concern (as yet unproven) that there may be a risk if the spray is inhaled, so you should be careful to avoid the face. However, sprays are...

What does it mean if the sunscreen says it's wa...

It means that after 20 minutes in the water the sunscreen retains 50% of its effectiveness (labelled SPF). Some sunscreens are labelled very water resistant, which means that they retain...

What's the difference between SPF30 and SPF50 p...

The SPF indicates the UVB protection. The amount of UVB radiation that is filtered out varies with different SPFs: SPF15 blocks 93% of UVB; SPF30 blocks 96.7% of UVB; SPF50...

How often should I reapply sunscreen?

It’s always difficult to give an accurate guide to how often to reapply, as the strength of the sun and skin type vary so much, but every couple of hours...

How much sunscreen should I use?

Probably more than you are at the moment! Most people do not use enough to achieve the quoted SPF. Some people suggest a shot glass worth, or a teaspoon per...