Cobweb is made by some kind spiders, it is mesh netting. It used to catch some little insect, or live in the netting. (The knotless netting also can be netting whatever you want to net.)  Some spider sick is much strong than the same steel wire in the same weight position. People are studying this issue. So the netting is widely used in agricultural, industrial, horticultural.

Sino Netting supply knotless plastic netting local in Fujian, China. Hope to do business with you.