Moisture-wicking boxers are generally too loose to provide support during a workout – your junk will flop around like a banana in a monkey fight if you try to jump rope while wearing loose boxers. This not only hurts like hell but will likely horrify other members at your gym and result in a flood of DMs in your inbox.
Briefs are tighter and more supportive, but if you have thick squatting thighs, they’re likely to rub together and chafe when things start to get sweaty.
Boxer briefs, on the other hand, are the best of both worlds, providing the support of briefs with the thigh coverage of boxers.