Sam's Club is a nation-wide wholesale membership club offering mattresses in their warehouse locations for pick up or on their website for shipping directly to your house. Founded in 1983 it is operated by Walmart Stores, Inc. and currently has more than 600 membership warehouse clubs. There is very limited selection of mattresses in warehouses for you to try and generally, their are in plastic bags located in a rack so trying is very limited. Typically no product knowledge or assistance is provided by sales associates. Sam's Club has one of the best return policies on merchandise, mattresses included.