Tree Hidden in the Forest Technique

Using a combination of ninjutsu and genjutsu, the user conceals their physical presence under a thin film of chakra in order to hide in plain sight. Oshikiri — a member of the Sand's Anbu — explains that this technique conceals the user's physical body, sound, and chakra signature. The singular flaw in this technique is that it does not cover the user's smell, making it easy for opponents with heightened sense of smell to detect them.

Trivia

 * The name of the technique refers to the idiom "to hide a tree, use a forest" which essentially amounts to "hiding in plain sight".