The Noose is a weapon used in AVP the movie and other places.
When used in the dark, the wire-thin Noose is almost impossible to see. The material is slim but strong, able to hold the weight of an adult human man as it yanks him up. It also constricts around the throat in such a way that the victim cannot produce any noise, allowing Yautjas to pick off stragglers in a group with the utmost stealth.
While used one on live victims, the Noose has been seen used on dead victims as well. Yautja's have a tendency to hang what they kill upside down by the feet, typically after skinning them alive.