Not only do your drinks and snacks stay pleasantly cool, but the young and dynamic design makes it a real eye-catcher. The exterior of the messenger cooler bag is made of high-quality polyester, while the interior is equipped with an antimicrobial additive that prevents the growth of bacteria. The antimicrobial interior is odor- and mold-resistant. The antimicrobial property is created by an additive that is added to the plastic during the melting process and then poured into the mold. This ensures that the antimicrobial protection lasts a lifetime and cannot be scraped off or weakened over time. It inhibits mold and fungal growth and prevents unpleasant odors.