Underwear that's actually good for varicocele needs to have the following 3 benefits:
Provide Maximum Cooling (Fabric)
Create Penis/Scrotum Separation (Design)
Provides Compression With Cooling (Compressive Scrotal Support)
Most scrotal supporters are not good for varicocele/your testicles because they over-heat your testicles. You must combine scrotal support with cooling to attain any real benefits. Compression naturally helps drain the varicocele. Maximum cooling helps improve testicular health & couteract the over-heating effect of varicocele.