In this work, we introduced RIGR, a 2D molecular graph featurizer that, by construction, ensures all resonance forms of a chemical species share the same representation. RIGR achieves this by using only the resonance-invariant subset of atom and bond features from the Chemprop package. Despite utilizing 60% fewer features, RIGR matches or even outperforms native Chemprop on several property prediction tasks, including on smaller datasets.