If visibility is important to you, try this G-string underwear. This mens g strings consists of a functional pouch that is attached to the waistband.
Doreanse Naked Cotton Modal Mini Trunk 1781
Good Devil Rock Hard G-String GDL035
Mens Good Devil
Good Devil Rock Hard G-string White
Good Devil GDJ016 Brief
Swear to these men's g-string from Good Devil for Valentine's Day
Doreanse Naked Cotton Modal Mini Trunk 1781
Gregg Homme Wonder Brief 96103
Mens Good Devil
Male Power Zipper Thong PAK-818