The PENN Cool bags are made of a 500D polyester material with PVC coating and the inside is made from a strong and high quality isolation material. As well, they are finished with a strong SW proof zipper with zipper pullers. The smaller size is perfect for storing bait for shore sessions or bringing some drinks, while the large size is perfect for longer sessions, fitting a large amount of bait and even have space for food and drinks. As well, it will fit trays of bait and it is ideal to carry fish home from the end of a session in prime condition. FEATURES 500D Fabric with PVC Coating SW proof Zippers Medium size:27*15*12cm Large size:37*17*28cm