Discover the luxury of this memory foam queen mattress. Temperature-regulating material in the stretch knit cover keeps you at a comfortable temperature all night long. Gel memory foam and high-density support foam conform to your body, delivering pressure relief and comfort. And a green tea-infused support foam base provides enhanced stability. Specifications▶ Specifications Details Brand Name Sierra Sleep® by Ashley Lifestyle Traditional Bed Size Queen Mattress Feature Cooling Assembly Assembly Not Required Product Details▶ Comfort level: firm Dual cooling action with phase changing material (PCM) High-density gel memory foam for lumbar support High-density body contouring support foam Green tea-infused base foam for added stability Hyper Cool luxury 4-way stretch knit cover for uniform comfort & durability Adjustable base compatible 10-year non-prorated warranty Note: Purchasing mattress and foundation from two different brands may void warranty; see warranty for details Foundation/box spring sold separately Mattress ships in a box; please allow 48 hours for your mattress to fully expand after opening State recycling fee may apply Made in USA Availability▶ Available Configurations SKU M31131 — Queen Dimensions: 79.5''W x 60''D x 12''H | Weight: 69.0 lbs▶This option is a Queen Mattress.SKU M31171 — Twin XL Dimensions: 79.5''W x 38''D x 12''H | Weight: 44.0 lbs▶This option is a Twin XL Mattress.SKU M31141 — King Dimensions: 79.5''W x 76''D x 12''H | Weight: 87.0 lbs▶This option is a King Mattress.SKU M31151 — California King Dimensions: 83.5''W x 72''D x 12''H | Weight: 87.0 lbs▶This option is a California King Mattress.