Combining a blue hoodie with sweatpants is a good choice for a laid-back look. Give an elegant twist to an otherwise all-too-common look by finishing with a pair of white canvas low top sneakers. Keep this outfit in mind come warmer weather, and we promise you'll save a ton of time trying to pick out what to wear on more than one occasion. This outfit should clear any doubts you had about dressing casually in your thirties.