Reach for Lancaster Sun Sport Cooling Invisible Body Mist SPF30 (£32) if you're looking for protection when you're going to be active. It can be applied onto wet (or sweaty) skin and doesn't need to be rubbed in. The mist is superfine, and it'll last easily through a game of tennis or beach volleyball. On testing, at first it was difficult to believe it would provide any protection, but it stood up to high temperatures and humidity without any problems.