Are Mesh/Textile Suits allowed at STT events?

My friend wants to do a track day in a textile 2 piece suit. Are these allowed at STT? This is Dainese 2 piece textile suit with knee sliders (if that makes any difference)

 

https://www.sportbiketracktime.com/index.php?route=information/information&information_id=11

Scroll down the page and check out the rider gear requirements

 

I see, thank you . Novice only!

 

Yes but not encouraged.... That crap melts at high speeds when on the ground.......

 

Yea, there is that!

 

We have rental leathers. Why take the chance.