iSleep Regal King Single Mattress $599.00 King Single / Medium - $599.00 King Single / Firm - $599.00 King Single / Soft - $599.00 King Single Size Medium Firm Soft Firmness 1 2 3 4 5 6 7 8 9 10+ Quantity Quantity Add to cart Features: 3 zone medium pocket spring High density dunlop foam Top panel with quilted foam High quality fabric