Twin Mattresses: Perfect for Adults and Kids. Twin mattresses aren’t just great for dorm rooms. You may want to invest in a twin mattress if you and your spouse have different sleeping habits and to help your kids move from a crib to a big kid bed. Gifts & Registry Health Home Home Improvement Household Essentials Jewelry Movies Music Office Pratt Retail Specialties Twin and Full Mattress Bag keep your mattress clean during moving or storing. Made of plastic material. The Signature Sleep Essential reversible mattresses feature a 1 inch layer of comfortable foam on the top of the mattress for a soft embracing feel with 5 inches of 13.5 gauge coil mattress springs for a great night’s sleep. .