Mesh included, however I do recommend that you visit Cocomama's post
here as she has also made other wonderful mesh conversions for teen guys.
Here are 32 patterned shirt re-colours for Cocomama's open shirt with jeans for teen guys mesh.
They are organised into 8 sets with 4 outfits in each set.
Set 1.
Set 2.
Set 3.
Set 4.
Set 5.
Set 6.
Set 7.
Set 8.
Credits:
Mesh - Cocomama