  We present the resummation of the full Pentagon Operator Product Expansion
series of the hexagon Wilson loop in planar $\mathcal N=4$ SYM at tree level.
We do so by considering the one effective particle states formed by a
fundamental flux tube excitation and an arbitrary number of the so called
"small fermions" which are then integrated out. We present our proposals for
the one effective particle measures at finite coupling. By evaluating these
measures at tree level and summing over all one effective particle states we
reproduce the full 6 point tree level amplitude.
