Made in California, USA, the Chattam & Wells Hamiliton Firm Set has the quality coils and quilting you deserve for a restful night's sleep. The tight top pleases most stomach and back sleepers. Four-way stretch knit fabric with Tencel® and Joma® wool keeps you drier along with seasonal thermal support. The cover is hand-tailored with eight-way hand tying to stabilize the “good stuff.” High density convoluted foam helps to eliminate the pressure points that can cause tossing and turning. Only the highest grade of polyurethane foam is used at the edges to ensure durability and excellent support. High density foam rails and a portrait edge keep you “in the zone” even when sweet dreams take you near the edge of your mattress. The innerspring core is quiet and exceptionally strong thanks to Hinge-Flex technology with helical wire. Offset coils are responsive for the ultimate in nighttime comfort.