The city pickers mulch covers are a great accessory item to any city Picker, easy Picker, start picking', 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 pressed polypropylene mesh fabric is mildly breathable, allowing for air exchange. It's still dense enough to act as a green house cover that keeps in heat & moisture & 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 & Weed covers will last for several seasons without breaking down & include a draw string design that lets you utilize the cover for practically any grow box up to about 2 square'. Start growing with your city pickers mulch covers by Emsco Group today.