These are xls-a filterpatch mushroom grow bags. They hold approxietly 10-12 pounds of hydrated substrate. They have an additive in the plastic to allow them to biodegrade at a much faster rate than conventional plastic reducing the burden on landfills.  
 
Proudly made in the U.S.A!
 
Free shipping in US. Contact me for additional shipping quotes on larger amounts.
 
Manufacturer's specs:
Type: Gussetted
Material: 2.2 Mil Polypropylene
Bag Size: 8″ X 5″ X 19″
Filter Type:A
Filter Size: 1.5″ X 1.5″
Filter Pore Size: 0.5 microns
Filter Hole: Style L