This ensemble shows it is totally worth investing in such menswear must-haves as a waistcoat and white jeans. For something more on the casual and cool end to complement this ensemble, complete this ensemble with a pair of brown brogue boots. During the winter season, when comfort is top priority, it can be easy to settle for a less-than-stylish outfit. However, this outfit is a bright example that you totally can stay comfy and remain equally stylish during the winter season. Overall, a smart pick if we're talking fashion tips for 20-year-old men.