Mesh included. However I do recommend that you visit Synapticsim's Lair here for more of his terrific work.
Here are 24 pairs of undies for Synapticsim's Lean bodybuilder.
They are organised into 3 sets with 8 pairs of undies in each set.
Set 1.
Set 2.
Set 3.
Credits:
Mesh - Marvine, Beosboxboy & Synapticsim.