A blue blazer and a white dress shirt are an easy way to introduce some polish into your casual styling lineup. Complete your outfit with tan suede desert boots to instantly amp up the cool of this outfit. Crafting a well-coordinated outfit can be a bit of a challenge on its own. Enter below-freezing temperatures into the equation, and the whole thing becomes even more difficult. No worries, this here is your winter inspo. Wondering how to nail casual style in your 20s? This combo is a perfect example.