[Superior Ice Retention: CORE COOL Insulation keeps contents chilled up to 2.5 days using high-density EVA foam to retain cold combined with reflective mylar film to repel heat. Leakproof: Guaranteed to be 100% leakproof thanks to the patented TRU Zip waterproof zipper along with fully welded seams inside and out. Durable Construction: The rugged TPU shell is both abrasion and puncture resistant ensuring years of use. Portability: Side handles and top carry straps create convenient transportation options. Added Storage: A front water-resistant zippered pocket stores small personal items.]