How long can you rest a brisket in a cooler?

[cow]

Also, I could soak those gel ice packs in hot water to add thermal mass under the towels for longer rests.

 

[Swine Spectator]

You do you, bro.

 

[dealgagrill]

Remember when resting your meat to take the temperature near the edge, as it will cool quicker than the middle.