Backpack for an 18 inch gaming laptop for a cheap(er) price.

What the title says. I just got a new 18 inch gaming laptop, it’s a unit, but I absolutely love it, and definitely will need a backpack to carry it in, in the near future. Any recommendation?

Preferably under $100, but if you have one that’s very well worth it with protection and features, I’ll definitely check it out.

Thanks!