The 4.5” memory foam youth mattress is from our exclusive Rest & Renew sleep line, available only at CITY. The 2.5” base foam supports 1” of memory foam and 1” of super foam, providing ergonomic support for comfortable sleep. Oeko-Tex breathable covers are certified to be free of harmful substances. The firm comfort level is ideal for back and stomach sleepers, and arrives conveniently packaged so you can unbox, unroll, and unwind. This mattress works with all traditional box springs, slatted foundations, solid foundations, and adjustable bases.