Rashi: In the end, he will send his legs to step on the net, and be caught.

Devar Eliyahu: Man is sent to this world with a net tied to his legs - a man's feet [are guarantors for him. They bring him where he needs to be - Sukah 53a]. All his life, a trap is spread for him. He walks on a net. Because you see him walk, you think that he is a free man. No! He cannot flee from the net.

Malbim: This describes how he is caught in the pit. The net spread around the pit, it clings to his foot. He sends his foot in the net; where he goes, it goes with him, until he gets close to the pit.

Rashi: It is a net, like a hair-net.

Ibn Ezra: In Arabic it is like a net.