for N w = 125 as a metric for hydrophobicity, we obtain a rough ordering of PE ∼ PTFE PMMA ∼ PVC ∼ N66 > PVA with acknowledgment that statistical uncertainties obfuscate some specific placements. The apparently low β μex w (N w ) for PVA is driven by most water diffusing into the PVA surface at low N w , signaling its high water affinity. Interestingly, the relative ordering of experimental contact angles (Fig. ) presents similar ambiguity with PTFE ∼ PE and PMMA, N66, and PVC all being near-equivalent.