Nightwear – also called sleepwear or nightclothes – is a clothing designed to be worn while sleeping. The style of nightwear may vary with the seasons. For example, warmer styles are worn in colder conditions and vice versa. 

Negligee — loose, sensuous nightwear for women is usually made of sheer or semi-translucent fabrics and trimmed with lace, bows, and other fine materials. Some styles or materials are designed to be visually appealing or erotic in addition to their functional purposes.