Washed-rind or smear-ripened cheeses are cheeses which are periodically treated with brine or mold-bearing agents. This encourages the growth of certain bacteria on their surface which give them distinctive flavors. There are hard and soft washed-rind cheeses. The softer ones are sometimes distinguished as "smear-ripened". Conversely, the term "washed rind" is sometimes reserved only for the hard ones.