men’s, women’s

 However eagerly department stores and the like may strive to dispense with punctuation in their signs (writing "Mens Clothing" or "Womens Department"), the practice is subliterate and to be avoided in any serious writing. Equally incorrect, if slightly less common, is placing the apostrophe after he "s" (e.g., "mens’ hats," "womens’ facials"). However, note that the apostrophe is discarded in such compounds as menswear and womenswear. See also children’s.