"moggins", or tartan legwear from the late 1600's and early 1700's, I believe....

...I'm quite open to being corrected here...

....were not knit wool, they were woven wool. In other words, they were probably made of much the same stuff as the kilt material was made from. Of course, the wearer would have been likely to mix and match tartans as he saw fit and his budget allowed. Thus it would be entirely possible for a highland townsman to wear a philebeig in one tartan, a jacket or waistcoat in another tartan (or a solid color) and leg coverings in another tartan.