The third installment of the One-derful! Collection focuses M-Pac!, the blues and hard soul imprint of this legendary R&B label group. M-Pac! is preceded by the One-derful! and Mar-V-Lus compilations and will be followed by releases of the Halo, Midas, and Toddlin Town sub-labels. This series marks the first in-depth study of what was once one of Chicagos most prominent African-American run labels.