The special PVA film is tough & strong, yet melts down without residue and most importantly, does so within the correct time frame. Many thin film bags begin meltdown on the descent and release the bait prematurely.
Plain PVA Bags are suitable for use with oil-based liquid additives and flavourings. The perforated PVA Bags have multiple small holes over their whole surface so pockets of air cannot remain trapped inside the bag. This makes them ideal for distance casting and ensures they sink rapidly in deep water.