The Harmony Lux beds introduce RightTemp Wave Foam which is effective at cooling due to its channeled design that increases airflow and because it uses carbon fiber to conduct heat away from the surface.

Micro Diamond Memory Foam, which has only been seen in the ultra premium Beautyrest Black mattresses, is now featured in the Diamond. Outstanding at pressure relief, this premium comfort material uses diamond particles to disperse heat, and works well alongside the carbon fiber found in the Right Temp Wave Foam.

The T2 Coil System in the Diamond is one of the best available and adds support specifically in the lower back area, where it's most needed, by using T2 coils which are made with two strands of steel twisted together. It's a pocketed system, so it's conforming, and it's made from high carbon steel, making it highly supportive and durable. This coil system is adjustable base compatible and shows a step up in mattress support technology.

Every Harmony Lux mattress has a quilt made in partnership with Seaqual, an ocean cleanup leader. Seaqual recovers plastics out of the world's oceans and transforms them into high-quality, eco-friendly fabrics that have a great feel. Each quilt uses a good amount of plastic, leading to a healthier, cleaner tomorrow.

With a non-prorated warranty that lasts 10 years, you know the Diamond Medium Pillow Top will be comfortable and supportive for just as long.

Solidly constructed with an innovative coil system and a plethora of high end comfort materials, the Beautyrest Harmony Lux Diamond Medium Pillow Top is a top option for firm pillow tops. This bed will work very well for you if you like a firm feel with some initial contouring.