The City Pickers Mulch Covers are a great accessory item to any City Picker, Easy Picker, Start Pickin', Bountiful Harvest or Hydro Picker grow box by EMSCO Group. These covers help prevent weed growth, even in contaminated soil, by creating a barrier that only your plants of choice can get through. The mesh fabric is tightly woven yet mildly breathable, allowing for air exchange. It's still dense enough to act as a greenhouse cover that keeps in heat and moisture and is also great for incubating seeds if you're using your Pickers grow box as a seed starter. This 2-Pack Mulch Cover Set is great for replacing previously used covers that have been cut up or modified to grow various crops. These mulch and weed covers will last for several seasons without breaking down and include a draw string design that lets you utilize the cover for practically any grow box up to about 2 sq. ft. Start growing with your City Pickers Mulch Covers by EMSCO Group today.