Here is an example of one of Ben Tarts reproduction wool jeans
"A reproduction wool and cotton fabric woven with a twill pattern often seen in confederate uniforms and civilian clothing of the 1800's.
Fiber Content: Wool and Cotton.
58 inches wide.
The wool in this cloth is a natural Cream sheep's fleece color and is woven on a natural cream cotton warp."
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Here is another example of a Natural gray jean wool also from Ben Tart
A reproduction wool and cotton fabric woven with a twill pattern often seen in confederate uniforms and civilian clothing of the 1800's.
Fiber Content: Wool and Cotton.
58 inches wide.
The color of this fabric derives from the natural gray color in the sheep's fleece and is fade resistant.
This fabric has been finished/pre-shrunk.
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You can find more examples of Conf. period vegetable dyed and natural (Undyed) Wool and Cotton Jeans on Ben's web site.
http://www.bnbtart.com/jeancloth.html
Here is some stuff from his FAQ page that might help some better understand some things about Jean wool etc.
"
What is the difference between dyed and fleece colors?
Fleece colors are the natural color of the sheep's fleece. In other words brown colored Fleece/fiber comes from brown sheep, white colored Fleece/fiber comes from white sheep, and a tan Fleece/fiber is what happens when someone doesn't lock the gate... no seriously a tan fleece color can be achieved by mixing the brown sheep's fleece with the white sheep's fleece."
"What is the difference between plains, jean, cassimere & satinette ?
The terms plains, satinette , cassimere and jean all refer to the weave structure in the cloth. All four weaves in the cloth we carry are wool filling threads woven over cotton warp threads. Plains cloth is a plain weave where the wool thread goes over one cotton thread and under the next. In jean weave the wool thread goes under 1 cotton thread then over the next two. In cassimere cloth the wool thread goes under 2 cotton threads then over the next two this weave is offset so that there is a defined twill line on both the face and the back of the cloth. In satinette the wool thread floats over several cotton threads before going under one. Satinette has most of the wool on the face of the fabric and most of the cotton on the back to mimic an all wool fabric."