This is a Bund Deutsche Mädel (BDM) Klettervest. There is no BDM areatriangle but it is clearly visible where there was one attached. It is up to the ne owner to restore ith with a triangle of choce or leave it as it is.
The jacket is in very good condition, still nice of collor and with the HJ/BDM insignia which looks to be original applied. All buttons are present.
These unmessed with BDM jackets have gotten quite rare to find today.