A black turtleneck and black jeans are a nice combination to keep in your menswear arsenal. If you're on the fence about how to finish off, a pair of black leather slip-on sneakers is a great choice. This combo is a viable choice when it comes to figuring out a knockout getup for unpredictable fall weather. Wondering how to perfect casual outfits as you pass the big six-oh? This pairing is a vivid example.