This luxurious 4-layer mattress is made of natural latex, a healthier alternative to synthetic rubber. Its 4-layer construction provides maximum comfort and support. The latex is infused with gel to give an extra bounce. This mattress provides a whole night's sleep, comfort, and health benefits, including summer heat sleep.  This 4-layer mattress is designed with a high-density core, foam edge support, and a layer of natural cotton. Specifications:Mattress Filling: Latex, Sponge What's in the Box:1x 4-Layer Japanese Style Natural Latex Mattress