The RTIC Day Cooler has plenty of room to store what you need to keep cold for up to 24 hours. The outside is made of heavy-duty polyester & the inside utilizes a high density insulation. The RTIC Day Cooler has plenty of room to store what you need to keep cold for up to 24 hours. The outside is made of heavy-duty polyester & the inside utilizes a high density insulation. Includes an adjustable shoulder strap for carrying comfort. This cooler bag has two places to store water bottles, extra snacks and small gear—a zippered pocket in the front and two mesh pockets on the sides.