The Hopper Flip 18 has ColdCell Insulation, a closed-cell foam that offers superior cold-holding to ordinary soft coolers, with a capacity of up to 16 cans plus ice.Features a 100% leakproof.HydroLok Zipper and high-density fabric that withstands punctures and UV rays.The DryHide Shell is waterproof and resistant punctures, and abrasions so it will hold its own when faced with the hazards of the wild