Heyward 4.5" Twin Size Sofa mattressGIVE YOUR GUEST BEDROOM AN UPGRADE: Your Favorite Houseguests Deserve a Awesome Night’s Sleep; This Sofa Mattress from Heyward is the Key, Made With Premium Materials, It’s an Easy Way to Keep Guests Supremely Comfortable, Without Overloading Your Budget, Just Be Sure to Measure Your Sofa Before You OrderA STEP UP ON THE STANDARD MATTRESS: Typical Sofa Mattresses are Poor-Quality, Uncomfortable Eyesores That Leave Sleepers Feeling Achy and Unrested, This Modern Alternative Is Made of Premium, Dual-Layer Foam Designed to Best Support Your Entire Body—Relieving Pain in Your Back, Neck, and Other Sore, Stiff JointsTOP-QUALITY MATERIALS, LUXURY EXPERIENCE: Luscious CertiPUR-US Certified Memory Foam Supports Your Body On All Sides, Super-Soft, Knitted Mattress Cover Helps Regulate Temperature and Wick Away Moisture, Unzips In Seconds for Easy Maintenance in Your Washer/Dryer, Exceptional Customer Service Connects You With Real PeopleEASY DELIVERY & INSTALLATION: This Replacement Mattress Comes Vacuum-Packed for More Affordable, Convenient Shipping, Just Open, Allow to Expand for a Day or Two, and You’ll be Ready to Set It Up in the Space of Your Choice , Fits Into Your Standard Sofa Bed, Pull-Out Couch, Daybed, or Trundle Bed to Create a Soft, Comfortable Sleep ZoneFOR REMODELS, GIFTS, AND MORE: Set Up a Guest Room, Upgrade Your Kid’s Bedroom with a Bunk or Trundle Bed, or Give a Helpful Housewarming Gift, Perfect for Replacing any Grungy, Worn-Out, or Poor Quality Spring Mattress, Also Great for College Dorms, AirBnBs, Bed and Breakfasts, Cabins, Vacation Homes, and Much More