In the modal, the fit is very good for size XL. I can say that the fit is much better than the previous ones I had purchased. I am 1.80 and weigh close to 100 kilos with an athletic body type.

I wear XL in most brands.
In this XL, while it has the right waist, it has a much shorter inseam and is somewhat tight around the thighs.
If you have a few extra pounds in your hips and waist, go for XXL or look for something else.

Edit.
I have to lower the stars because I can't even fit into XXL.

To the company:
Reconsider the sizing in all boxer series. Especially in those that are worth paying for (modal/tencel).
You are 3-5 cm shorter in the inseam in XL & XXL.
Otherwise, you will only sell to 15-year-olds...