Meet Avenco 12 inch Hybrid Mattress. This pocket coil king size mattress is a four-layer structure that maintains spinal health. The high-resilience memory foam mattress also helps you maintain a proper sleeping position and distributes your weight from head to toe evenly throughout the mattress. The gel-infused king size mattress with an open cell of gel memory foam provides excellent breath and all night cooling. Finished with a warp knitting fabric cover, this luxurious firm mattress king is compressed and smartly delivered in a box for convenient setup.