Extended Life


King Koil® Extended Life™ mattresses are engineered to be durable and supportive for anybody,from big and tall people down to the most petite individual. These heavy-duty-plus mattresses are built to last - with a warranty against sagging or body impressions for 25 years! Our XL Mattress Collection features the eXtended LIfe Foundation, which surpasses the standard wooden foundation with three times the support. We use the most resilient high-density foams and memory foams, the most durable natural latex, and every high-performance feature to maintain a long-lasting, restful and healthy sleep.

Product Status: 
Coil Count/Density: 
SizeCoil Count
Twin XLn/a
Full XLn/a
Cal Kingn/a
Rate This Product: 
No votes yet

Compare features of different product lines here

Share This: 
Mattress Type: 
Quilt/Top Layers: 

Stretch Knit Cover
Superior High Density Foam Quilt

Comfort Layers: 

Enhanced Talalay Conform Latex - select models
High Density Memory Foam - select models
Superior High Density Foam (1.8 density) - select models
Enhanced Superior High Density Foam - select models
Superior High Resilience Foam - select models
High Density Performance Foam - select models

Support System: 

eXtended LIfe Performance System - Double Offset Coil (see coil count below)
Contour Flex Pro Coil System - heavier gauge inter-connected coils (more expensive models)
Balanced Base Foam

Coil Gauge: 
Edge Support: 

Excellent Edge™ Foam Encasement


eXtended LIfe Foundation

Foundation Height: Regular 9", Low Profile 5.75"

25 Year Limited - first 15 years Non-Prorated Warranty Non-Prorated + 10 years Prorated Warranty Prorated
Body indentation Body indentation of 1" or greater