Summer sunshine is wonderful, especially if you’re used to living in some damp, dingy city where winter sits on your head like a wet bathrobe. But there is a downside to too much sun, and we don’t just mean the melting ice-cream or damp patches on the back of your pants. Having to work in extremely hot temperatures is enough to make the toughest dude wilt under pressure, and so it’s good to know there are options.