Pleatco filter cartridges center around a completely unique, uniformly bonded filtration media driving super-charged cleaning performance, vastly superior to anything that has come before. Their 4oz bonded media contains more fibers per unit area offering far greater volume dirt holding capacity than other filtration fabrics. Due to uniformly placed weld spots, their advanced bonded fabric is strong and robust, and returns to a high state of original performance after cleaning, meaning greater usability, longer cleaning cycles, and less service time.