The Beautyrest Silver BRS900 is a 12-inch medium-firm king mattress from Simmons Beautyrest, designed to deliver supportive, temperature-regulated sleep. It features a DualCool™ Technology Fiber cover—an antimicrobial performance layer that draws heat and moisture away from the sleep surface to help keep you comfortable throughout the night.

The comfort system includes 1.25 inches of AirFeel Foam, 0.5 inches of Firm Comfort Foam, and 1 inch of Medium Comfort Foam, along with a Gel Memory Foam Lumbar Support layer that targets the lower back. The support core is an 8-inch 900 Density Beautyrest Pocketed Coil system, which individually wraps each coil to reduce motion transfer and provide responsive, contouring support across the sleep surface. Mattress composition is hybrid (innerspring with foam layers). Mattress thickness is 12 inches. Bed frame, headboard, and accessories are not included.

Costco includes delivery, in-home setup, and haul-away of your old mattress with purchase. The mattress is backed by a 10-year manufacturer's warranty.