Crocodile Cap

From the Metal Gear Wiki

Crocodile Cap is a cap shaped like a crocodile head used by Naked Snake in Metal Gear Solid 3.

To get to the ledge, the player must climb a tree and use ropes to navigate down into a hidden clearing. The crocodile cap is located there.

While the cap is equipped, guard dogs will refrain from approaching Snake, and Snake can be mistaken for a crocodile when in water and mostly submerged, such as in Ponizovje South, when swimming the aqueduct.