to be of poor/good quality

[Will17]

Hello!

Can we say:

"These shoes are of poor/good quality?"

Is "of" necessary in this sentence?

Thanks a lot
W

[birdeen's call]

I'd keep it, even if it's not what the majority of speakers would choose. Please don't consider this opinion anything more than an opinion though.

[bhaisahab]

I'd keep it, even if it's not what the majority of speakers would choose. Please don't consider this opinion anything more than an opinion though.

I'd keep it too.

[5jj]

I'd keep it, even if it's not what the majority of speakers would choose. Please don't consider this opinion anything more than an opinion though.

I am of the same opinion.