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King Koil | Heavy Duty Mattress | Extended Life Mattress

Product Information

A common misconception is that the Extended Life XL91 King Size Mattress is only made for people who are overweight. The fact is the heavier building materials that makes up this heavy duty mattress and the optional foundation are longer lasting and much more resistant to excessive breakdown and the really deep body impressions associated with nearly any other brand of mattress made. This is the 2nd firmest mattress in the series of 6 beds.

Price and sizes available


Foundation- Optional and comes in 2 pieces

Coil Count

  • Twin - 253
  • Full - 368
  • Queen - 450
  • King - 575

Fabric-Stretch Knit

Special Features--Tailormade Tufting™

Quilting-- SafeGuard® 1" Superior High Density Foam

Top Upholstery- 1" High Reslient Foam, 2" eXtended Life Foam, Firm Insulator Pad

Mattress Spring Unit-- eXtended Life Performance System 368 12-1/2 gauge Double Off-Set

Bottom Upholstery - Balanced Base Foam

Edge Support - Excellent Edge™

Foundation - eXtended Life Heavy Duty Foundation

Warranty - 20 Years

King Koil