Who makes something similar to Kuiu's Kutana pants?

[Loo.wii]

Stone Glacier de haviland lite. Adjustable waist for a near custom fit. Almost full length side zips for great airflow when hot. Very durable in my experience.

Top notch pant. And the have slots for knee pads

 

[cuerro viejo]

These ones? https://outdoorvitals.com/products/adventure-pant?variant=31820166168637

Yes they use to state is was Toray fabric and now state Japanese mechanical stretch. I don’t think they changed fabric though