A short sleeve shirt and a grey crew-neck t-shirt are amazing menswear essentials that will integrate really well within your casual routine. You can take a classic approach with shoes and complete this ensemble with a pair of dark brown leather casual boots. Keep this ensemble in your front hall wardrobe come warmer weather, and rest assured, you'll save time getting ready on more than one occasion. When it comes to casualwear for gentlemen over 30, this ensemble looks good on almost any gent.