HYBRID COMFORT DESIGN: This full mattress combines gel memory foam, ultra‑plush quilt foam and pocketed coils to create a supportive full mattress that contours to your body for pressure relief and long-lasting comfort GEL LUMBAR SUPPORT: Features .75" high‑density gel memory foam that targets your lower back, delivering enhanced restorative support—ideal for anyone seeking a full mattress for back pain‑medium firm level comfort in a full size profile SUPPORTIVE COIL SYSTEM: Built with 2 perimeter rows of 9" 13‑gauge wrapped coils that minimize motion transfer and offer durable edge support, creating a responsive feel similar to a queen memory foam mattress but tailored for full size sleepers EASY SETUP & VERSATILITY: This mattress in a box arrives compressed for quick setup; compatible with most bed frames and adjustable bases, making it a great alternative to a queen size bed or guest‑room upgrade FULL SIZE DIMENSIONS: Measuring 53" W x 74.5" D x 12" H, this full size mattress fits a variety of spaces; CertiPUR‑US certified foams and a 10‑year warranty ensure long‑term peace of mind without the bulk of a king mattress