NAITE's Crop Pretective Netting is a bi-oriented polypropylene netting, with square mesh. It is light weight but strong with its special process. It can prevent birds from roosting and nesting in undesirable areas or from eating fruit or crops especially for your farms, and your vineyard,orchards.NAITE supplies two different weight and meshes for different usage. The Light weight is with 3/4'' opennings, and canbe make from 10-20gsm, the heavy grade is with 1/2'' holes and 30-40gsm.