Rock a white and red print crew-neck t-shirt with navy jeans to feel unstoppable and look fashionable. Complement this outfit with brown leather chelsea boots for a dash of sophistication. Can you see how super easy it is to look stylish and stay snug when chillier weather comes, all thanks to ensembles like this? So if you need outfit ideas on what to wear as you slip into your 30s, this ensemble is definitely worth saving for later.