In the past keeping your filters easily accessible and safe has been challenging now with the sturdy sw150 field pouch your filters remain free of dirt and dust but are close by when you need them constructed from a tough and durable fabric that can stand up to wear and tear the sw150 mark ii field pouch features a concertina design with one slot per filter maximum of 10 filters its an invaluable accessory that gives photographers freedom to respond quickly to rapidly changing conditions