Teaming a brown v-neck sweater with a dress shirt is a wonderful idea for an effortlessly classic menswear style. Want to tone it down in the shoe department? Complete your getup with a pair of navy leather boat shoes for the day. So so as you can see, it's a sharp, not to mention season-appropriate, ensemble to keep in your transitional collection. And if we're talking outfit ideas for guys in their 30s, this ensemble is ideal.