This laid-back combination of a navy henley sweater and a crew-neck t-shirt is extremely easy to put together without a second thought, helping you look sharp and prepared for anything without spending too much time digging through your closet. Rounding off with a pair of black leather work boots is a guaranteed way to add a hint of stylish effortlessness to this look. Wondering how to nail casual looks as you slip into your 30s? This combo is a perfect example.