Signature Sleep 8" Hybrid RenewGel / Coil Mattress: Top layer of RenewGel ensures a cool sleeping surface CoolMax outer cover Independently encased coils: Twin: 480 coils Full: 672 coils Queen: 816 coils King: 1020 coils Memory foam conforms to body for comfort CFR1633 compliant Twin dimensions: 75" x 39" Full dimensions: 75" x 54" Queen dimensions: 80" x 60" King dimensions: 80" x 76" Beds sold separately . See our assortment of beds . Bed frames sold separately . See our assortment of bed frames . Great for platform beds. Requires foundation or box spring with standard bed frames. Foundations sold separately . See our assortment of foundations .