Superior Ice Retention: CORE HYPERCOLD Insulation keeps contents chilled up to 3.5 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, a shoulder strap, and top carry straps create convenient transportation options. Added Storage: A front, water-resistant zippered pocket stores small personal items. The CORE Insulated Leak Proof Soft Coolers are the ultimate solution for keeping your lunch food and Stanley drinks cold and fresh for extended periods. These coolers come in a variety of sizes - 12 can, 20 can, 30 can, and 36 can - to suit your specific needs like a lunch box. They are designed to be used for a wide range of outdoor activities such as camping, picnics, beach trips, and travel, making them versatile and practical camping accessories for any adventurer. One of the most impressive features of these heavy duty yeti style coolers is their superior ice retention capabilities. The CORE Insulation system is made up of high-density EVA foam, which is known for its excellent thermal insulation properties. This foam, combined with reflective mylar film, creates an effective barrier against heat, ensuring that your food and drinks stay artic chilled for up to 3.5 days. Another major advantage of CORE coolers is their guaranteed leakproof design. The patented TRU Zip waterproof zipper ensures that no water or air leaks through the zipper, while fully welded seams inside and out provide added protection against leaks. This means that you can transport your cooler without any worry of leaks or spills, making it a reliable and convenient option for camping activities. The rugged TPU shell is abrasion and puncture resistant, ensuring that your cooler can withstand rough use and last for years. Additionally, the shell is easy to clean, making it simple to maintain the quality and appearance of your cooler. CORE coolers are also designed for portability. With side handles, a shoulder strap, and top carry straps, you have multiple options for carrying your cooler, making it easy to transport it from one location to another. The front, water-resistant zippered pocket is an added bonus, providing additional storage space for camping essentials. In conclusion, the CORE Soft Coolers are an excellent investment for anyone who loves outdoor activities.