Think of row covers first when seeking pest protection. Protects crops from flea beetles, cabbage worms, potato beetles, leafhoppers, even woodchucks.
Lightweight spunbonded polypropylene, with UV stabilization, weighs 0.55 oz/sq yd, transmits 85% of sunlight, offers 4° of frost protection. Soft and pliable with good tear resistance. Can last 2–3 seasons if you take care of it.