Such items as a grey crew-neck t-shirt and brown camouflage sweatpants are an easy way to introduce effortless cool into your day-to-day styling arsenal. Mustard athletic shoes are a fitting option here. This outfit is also ideal if you're looking for warm weather wear to get through a tedious day. Gents wondering how to pull off cool casual style as you make it through your 20s, this getup should answer your question.