Rule - Blåhaj Lemmy

I mean we can also make long lasting clothes out of natural fibers without hurting animals.
Cotton | Industries | WWF

World Wildlife Fund - The leading organization in wildlife conservation and endangered species.

World Wildlife Fund

And cow feed is also grown with tons of pesticides and you need much more of it for less tissue at the end.

I have hard time seeing clothing with a bigger environmental than leather.

Of course, but there are more options than leather, like bamboo, linen, and lyocell.