A major mattress chain, Mattress Warehouse stocks the major mattress brands and says it will beat the competition's prices by 25 percent. Headquartered in Frederick, Mattress Warehouse maintains a store in Germantown off Middlebrook Road just north of Rt. 118. The staff says the public is fairly under-educated on what makes a good mattress. The staff members therefore go through lengthy training sessions, visit factories where mattresses are made, and tries to relate that knowledge to their customers so they can make an informed choice when purchasing a mattress.