This smart casual combination of a grey blazer and charcoal jeans is super easy to throw together without a second thought, helping you look stylish and prepared for anything without spending a ton of time going through your closet. Black leather casual boots are a never-failing footwear option that's full of character. Embracing winter is going to be extremely easy with such combos as your fashion inspiration. All in all, a popular choice if we're talking fashion tips for guys in their 20s.