It's essentially the same as the Men's O Series Boxerjock 3" but slightly longer yet costs the same!

The problem is the size as it runs SMALL >:(
This sizing problem is very typical of Under Armour!
I had to buy an XL instead of a Large.

It fits well once you get the proper size and doesn't seem to ride up but it's still too early to tell as it's new.
The boxerjock's material breathes, which is very good in hot weather.
It also provides good support but not too restrictive or snug.

If you're skinny, then buy your normal size.
If you're the "average" male, then buy UP one size!

The 6" version is meant for people who like boxer shorts.
I prefer briefs so I'll stick with the 3" version!

Lastly, it's relatively PRICEY as cotton briefs or boxer shorts cost 2/3 LESS!!
Stock up whenever it's on sale at various clothing merchants!