The JJC FP-K4 GRAY series Foldout Filter Pouch is specially designed for holding filters. The FP-K4S GRAY can hold 4 filters up to 58mm and the FP-K4L GRAY can hold 4 filters up to 82mm. The exterior of the filter pouch is made of high quality polyester material, sturdy and durable. Filters placed within this pouch are each held within one of four elastic pockets and can be easily accessed by opening its hook and loop closure.