JAY-BE Benchmark S5 Mattress, 20cm Thick, Hybrid e-Sprung, Medium Mattress, 100% Foam Free, Hypoallergenic (4ft6 Double, 190 x 135 x 20cm); Hybrid Double: The Jay-Be Benchmark S5 Double mattress offers medium firmness and adaptive support through its deep e-Spring core topped with Micro e-Pocket springs which adapt to your body's gentlest movement throughout the night., Breathable Layers: A deep e-Spring core is topped with a cushioning layer of breathable e-Fibre comfort layers for improved moisture and temperature regulation for a fresh, ambient sleep environment all night long., Hypoallergenic: Soft to touch luxury and durable knitted cover made with hypoallergenic, odourless materials that create a less hospitable environment for dust mites and other microorganisms., Sustainable Materials: Made in the UK using certified zero-to-landfill manufacturing, all Jay-Be Benchmark mattresses feature Advanced e-Fibre and materials that are 100% foam-free and 100% recyclable., Easy Delivery and Set-Up: Vacuum-packed, rolled, and sealed at production to keep your mattress fresh and reduce packed size by up to 70%. Delivered compressed for easy handling. Simply unbox, unroll, and allow it to expand. color: Grey