450, you are correct.

They are designed to stop the saw.

That's why I added ballistic stuff to my post above.

I think they might be good at stopping scratching or clawing though. Like you I'm not really sure.

The lightweight tactical stuff would be a good start I think.

Also, it's hard for me to see how chainsaw pants would make an attack worse.

It just dawned on me, tho...

I think meat cutters protective clothing would be the ticket.

That stuff is pretty lightweight and might work out best. Gloves, vests are available. I'm not sure about pants.