J/30 Class Association Forums J/30 Forum One Design Class Rules 0.5 oz Spinnaker

As far as I know, Both PHRF-BC and PHRF NW are not using a ODR for the J/30 but a standard base yacht rating with adjustments for sail size. In that case, sail material does not come in to play one bit.

I carry a 0.5 Oz spinnaker in PHRF; all they cared about was the size of the largest kite.