What is the difference between nightwear and sleepwear?
Sleepwear is typically what you would wear to bed, while loungewear is used for relaxing at home or running small errands (such as popping to the local shop). Loungewear is smarter than sleepwear, but more comfortable that what you may wear to work. Sleepwear can be used as loungewear (and vice versa), however you should avoid wearing your bed clothes outside of the house.