Need help identifying the cotton "type" of these trousers

[pepesylvia]

They are 100% cotton, my guess based on the weave is twill?

 

[jakobiller]

The fabric has a diagonal ribbing typical of a twill weave so yea would say its cotton twill

 

[denisebrain]

It's tricky to tell: Is the twill left- or right-hand? In other words, is the diagonal going up to the right or the left?