Why do the Danton Black copies come fully clothed?

In episode 2 of the new Flash tv show the team goes up against Multiplex a.k.a. Danton Black.

At some point, Caitlin uses the stem-cell residue on Barry's suit to grow an empty shell - and he also grows into a fully clothed empty - at least at first - shell. But even before we had seen Black splitting himself up numerous times.

And they all come out fully dressed!

If the "clones" are grown from stem cells, as Barry's early analysis suggests - which, as he also mentions that stem cells are the most versatile cells, since they can be "programmed" to grow into any cell needed, seems rather clever to me - how do they appear fully clothed? Granted, Black could have worn entirely organic fiber when he was hit with whatever the exploding particle accelerator threw out there, but are human stem cells that programmable that he got clothing out of it?? (keeping in mind they not only grow into clothing, but dye themselves black as well!!)