ZINUS 12 Inch Foam and Spring Mattress, Twin, CertiPUR-US Certified Foams, Mattress in A Box, White

DURABLE COMFORT – When soft, yet durable foam layers combine with steel innersprings, a match made in mattress heaven happens, resulting in a supportive spring mattress with the right hint of conforming softness TOP QUALITY LAYERS – 1.25 inch durable high-density foam, 4.5 total inches conforming ViscoLatex foam, and a 6 inch base layer of heavy duty steel coils; ideal for back and stomach sleepers and petite to average weight individuals CERTIPUR US CERTIFIED - Highest quality foam is CertiPUR US Certified for durability, performance, and content.