12x20x1 Furnace Air Filters MERV 12 Pleated Plus Carbon 12 Pack grow media These microporous boot covers are

These microporous boot covers are clean processed to offer the perfect balance of safety and comfort

pH CALIBRATION

• Use with leafy plants

Made from Heavy Duty Clear Polyethylene

12x20x1 Furnace Air Filters MERV 12 Pleated Plus Carbon 12 Pack grow media These microporous boot covers areNordic Pure 12x20x1 MERV 12 Plus Carbon air filters are made of a dual material where the MERV rated material has been fused together with a carbon layer. This results in less flow restriction and 33% more surface area for cleaner smelling air. It will help eliminate unwanted odors as well as trap most airborne dust and particulate matter for fresh, clean air. Odorous gases and vapors (VOC) are attracted to and held by the activated carbon material