Men also have some great comfortable options when it comes to nightwear. They can choose from the classic two-piece set that comes with long pyjamas and a nightshirt. As an alternative, they can also choose to pair boxer shorts instead of pyjamas in warmer countries. A simple tank top or loose cotton tee paired with shorts is also what some guys frequently wear while sleeping at night. Trackpants are also ideal for sleeping. Your selection may also vary as per your personal preferences. So, choose accordingly.