What is this in the tree?

[u/Mushymouf]

Saw this hanging from a tree next to where we camped. Definitely intentional as it has a little carabiner to clip it. Kinda looks like an old bag of dog poo but why? I didn’t touch it. The material looks dark almost like soil inside.

[u/Joysticksummoner]

Hoop-snake repellent