The sun doesn't differentiate between the skin on your face and the skin on your lips, so it's important to have a lip balm that contains SPF if you're going to be outside. We recommend the new Beauty Pie Super Healthy Skin Nourishing Lip Balm SPF 30 (£25), which not only provides UVA/UVB protection, but also is seriously hydrating, thanks to ingredients like olive oil squalane and avocado and grapeseed oils.