Keeping things cold is what Denali Coolers is all about.  With up to 4X more insulation than most ordinary coolers.

Denali Peaks above the competition!

The EXTRA Thick-Wall design of Denali is constructed with up to 2.4 inches of polyurethane foam for maximum ice retention.

The bottom line is that insulation thickness correlates to ice retention.

Denali shows PEAK performance!