Such staples as a black and white crew-neck t-shirt and navy jeans are an easy way to infuse extra cool into your day-to-day styling collection. If you're hesitant about how to finish off, a pair of low top sneakers is a foolproof option. Naturally, it's easier to work through a hot summertime afternoon in a summery combination such as this one. Wondering how to master casual looks as you head into your 30s? This pairing is a vivid example.