IEI King-size Mattress, 12-inch (about 30.5 cm) Mixed King-size mattress, boxed, Memory Foam mattress, with Pocket spring, medium hardness, Stress relief and motion isolation,CertiPUR-US certified,365 nights t

Achieve a night's sleep - This king-size mattress is exactly what you'd expect from a hybrid mattress: a soft, comfortable foam top covered with support coils. The king mattress has a medium hardness rating for stress relief and support comfort.
CertiPUR-US Certified Memory Foam Plus-size mattresses - so you know that strict material and ingredient guidelines are followed throughout the manufacturing process.
Good air permeability - the top foam layer of the king-size mattress contours to fit your body like memory foam, but without the insulation effect. The spring improves air permeability and creates space for air to circulate. Quilted foam and European upper layer add a touch of luxury.
Upgraded Edge Support + Motion Isolation - The edge of a king-size mattress is lined with high-density foam, which means you get unbeatable edge support. There's also a lot of stress relief, and this king-size mattress is very able to absorb exercise, which is good news for anyone with a one-bed.
Queen Mattress 365 Nights Trial - King mattress comes in a box. You'll get a 365-night trial period and a lifetime warranty, so you can be sure it fits.