Penfolds RWT Shiraz presents an admirable alternative to the multi-regional sourcing and American oak maturation that are hallmarks of Grange, expressing instead, single-region Barossa Valley Shiraz matured only in French oak. The initials RWT stand for 'Red Winemaking Trial', the name given to the project internally when developmental work began in 1995. Naturally, now no longer a 'Trial' !