Any nightgown or form of sleepwear can be worn by a person of any gender so long as the garment itself fits and is comfortable for that person to wear, but online marketplaces like eBay, JC Penny and Amazon are a good place to start looking. These sites provide buyers with access to large catalogs of nylon sleepwear and other nightgowns.
Amazon is an online listing site and storefront where both corporate and private sellers can post their wares for sale. The site sells many different brands of nightgowns and other sleepwear in both new and used condition, allowing users to browse their inventory in search of deals within their price range.
eBay is an auction site with listings from all over the world. Sellers post nightgowns, nylon and otherwise, for auction or for direct sale at a fixed price. Each item on the website is provided with a landing page where its condition and price are discussed along with its maker, its thread count and in some cases supplemental information regarding care and washing.
The JC Penny online store has a large range of nightgowns. Search the store's inventory of nightgowns and other clothes by typing the names or types of garments of interest into the site's search bar.