diff --git a/src/HHbbVV/processors/bbVVSkimmer.py b/src/HHbbVV/processors/bbVVSkimmer.py
index fe669e6a..a6b9b2da 100644
--- a/src/HHbbVV/processors/bbVVSkimmer.py
+++ b/src/HHbbVV/processors/bbVVSkimmer.py
@@ -340,6 +340,9 @@ def process(self, events: ak.Array):
 
         jets, _ = get_jec_jets(events, year, isData, self.jecs, fatjets=False)
 
+        # dR_fatjetVV = 0.8 used from last two cells of VBFgenInfoTests.ipynb with data generated from SM signal vbf
+        # https://github.com/rkansal47/HHbbVV/blob/vbf_systematics/src/HHbbVV/VBF_binder/VBFgenInfoTests.ipynb
+        # (0-14R1R2study.parquet) has columns of different nGoodVBFJets corresponding to R1 and R2 cuts
         vbf_jet_mask = (
             jets.isTight
             & (jets.pt > self.ak4_jet_selection["pt"])