Go for a smart casual outfit in a white crew-neck t-shirt and navy dress pants. Dressed like this, any middle-aged guy is bound to put most of his peers to shame.
White Crew-neck T-shirt with Navy Dress Pants Cold Weather Outfits For Men After 40
You'll be surprised at how extremely easy it is for any guy to get dressed this way. Just a white crew-neck t-shirt and navy dress pants. A pair of black leather casual boots brings a relaxed aesthetic to the outfit. This ensemble proves that as a gentleman in his 40s, you have a wide range of sartorial options.