Detail this asset from Unity Asset Store: Original Link
This is a paid asset, but now you can download Dynamic Bone Free.
Dynamic Bone v1.2.2 (Latest version)
Dynamic Bone v1.2.1
Dynamic Bone applies physics to character’s bones or joints. With simple setup, your character’s hair, cloth, breasts or any part will move realistically.
– Very easy to setup, no programming required.
– Fast and stable physics simulation.
– Works with Mecanim and legacy animation.
– Support all versions of Unity, from Unity 4 to Unity 2019, mobile friendly.
– Full source code included.
If you are not sure is Dynamic Bone works for you, please mail firstname.lastname@example.org to request for an evaluation version.