  There is convincing observational evidence for an increasing cosmic-ray
positron-to-electron ratio at energies larger than $\sim 10$~GeV, at odds with
expectations from secondary positron production. The most recent AMS-02 data
exhibit an interesting spectral feature consisting of a bump at an energy
around $300$~GeV followed by a drop around $\sim 800$~GeV. A possible
explanation to the most recent data is that the excess positron originates from
decaying dark matter. Here, we show that models consisting of two dark matter
particle species contributing equally to the global cosmological dark matter
density provide strikingly good fits to the data. The favored models, with a
best-fit with $\chi^2/d.o.f \sim 0.5$ consist of a first species weighing
$750$~GeV decaying with a lifetime $\tau_{\chi}\sim 10^{26}$~s to $\tau$ lepton
pairs (or to a pair of vector bosons subsequently decaying to a $\tau$ pair
each), and a second species with a mass around 2.3 TeV decaying to $\mu$ lepton
pairs. We provide a few possible concrete realizations for this scenario.
