They say:

One of our most popular custom 2in1 pedals is the Orange Whip compressor and PInkman dirty boost in one enclosure.  Running the compressor into the drive creates a saturation that’s great for solos but still punchy enough for driving rhythm parts.  With the H-Bomb Drive, we’ve incorporated both circuits for a versatile and musical drive pedal that can go from clean to mean and everywhere between.