Pairing a grey turtleneck with grey dress pants is an on-point idea for a smart and classy ensemble. For a more casual aesthetic, why not add grey athletic shoes to this getup? As you pass the big three-oh, you probably want to start dressing like an adult man. If that's the case, combinations like this become a great source of inspo.
This pairing of a grey turtleneck and white jeans epitomizes casual cool and relaxed menswear style. Take an otherwise mostly classic ensemble in a whole other direction by slipping into grey athletic shoes. A good example for gents aiming to adjust their look towards maturity.
Pairing a grey turtleneck and grey dress pants is a guaranteed way to inject your current rotation with some rugged elegance. Why not take a more casual approach with footwear and complete this ensemble with grey athletic shoes? This outfit is most probably what you're looking for as a young gentleman.
For an outfit that brings practicality and dapperness, consider wearing a grey turtleneck and black chinos. Want to dial it down with shoes? Add a pair of grey athletic shoes to your outfit for the day. As you turn 30, you probably want to start dressing more professionally. In this case, getups like this are ideal as inspo.