I want to buy ONE 173 (kickboxing) tickets in Japan. Could you help me understand what’s special about the ‘CAT3 Noiri Support Seat Privilege’ seats?

Hi all, I'm looking to go to Japan to watch a massive MMA/kickboxing event in November at the Ariake arena.

I'm eyeing the 'CAT3 Noiri Support Seat Privilege' seats and the description says that it contains 'Special goods'.

Could anyone who speaks/reads Japanese kindly help translate or find information as to what that means? Thanks!

by ChocolateBBs