You're looking at the irrefutable proof that a black leather biker jacket and sweatpants are awesome when combined together in a casual street style look. To give your overall look a more polished spin, introduce a pair of white and black low top sneakers to this ensemble.
A beige puffer jacket and sweatpants are a pairing that every stylish gent should have in his casual arsenal. Look at how great this ensemble is complemented with white and black low top sneakers.
A grey parka and sweatpants are a nice combo to add to your off-duty rotation. Avoid looking too casual by finishing off with white and black low top sneakers.
If it's ease and practicality that you're looking for in menswear, consider wearing a light blue herringbone overcoat and sweatpants. Dial up your look by wearing white and black low top sneakers.
A black shearling jacket and sweatpants are the kind of a no-brainer casual getup that you need when you have no extra time to spare. If you're hesitant about how to round off, introduce white and black low top sneakers to the mix.