This is a Bund Deutsche Mädel (BDM) Klettervest. It is made of typical brown Hitlerjugend (HJ) cloth and is most probably a summerjacket. The cloth is thinner as the usual BDM suede jackets that were quite warm to wear.
It is in very good condition.
All buttons present, most are BDM/JM (Jungmädel) marked. There is also a Jugendherberge Marienburg tinnie attached.
Quite rare to find today.