The precursor to the modern-day nightgown is the chemise, the undergarment women wore under their long dresses to prevent gowns from getting dirty. Today, the nightgown is a staple of women's sleepwear wardrobe. Nightgowns are a type of sleepwear that hangs loosely about the body, so the legs are not as visible as they are in pajama pants. Nightgowns usually feature feminine touches such as lace, ribbons and bows, and may or may not be sleeveless. Nightgown sleepwear is often paired with matching robes. pajama jeans. HerRoom.com features a variety of nightgowns sleepwear from many different manufacturers. Check out the nightgowns sleepwear selection at HerRoom.com today and enjoy free shipping.