Wacky Bubble Filter Bags – Nylon Canvas Sidewalls Original Wacky Bags – 5 Gallon Single Bags.  Create your own bubble hash bag set. Wacky Bags are available in these Micron sizes: 220 110 90 45  25 Wacky Bubble Filter Bags are constructed with 100% waterproof nylon canvas sidewalls with mono-filament mesh micron screens lining the bottom. These heavy-duty Wacky Bags are made with the strongest nylon canvas on the market and are stitched with 100% nylon thread for extra durability.  They will endure extreme ice-cold water temperatures.