Give your hoodie and rest and opt for something more sophisticated for those summer date nights. Cardigans are still cool and functional for the season and worked their way from conservative preppy crews to the backs of many rappers. The trick is to get one that's lightweight and breathable. Bonus points if it looks as good with a T-shirt as it does with a button down. We rounded up the best of the seasonal staple in our Coolest Summer Cardigans Available Now.