This pairing of a grey polo and black jeans is definitive proof that a simple off-duty ensemble can still be extra sharp. And if you need to effortlessly up your outfit with footwear, add black suede chelsea boots to your look. You're sure to always look cool even despite the summer heat if you keep this getup in your front hall closet. So if you need style inspo for dressing as you step into your 30s, this combo is definitely worth saving for later.