Ariat Work Flame Resistant Jeans Mid Rise Stretch Boot Cut FR CAT 2 Sz 28 R

Ariat Work Flame Resistant Jeans Mid Rise Stretch Boot Cut CAT 2 Size 28 Regular Color- Blue Quartz Thick Stitch Preowned- has two small places where it looks like the jeans have something on them as shown in the last two photos, not sure what it is but did not come off when I washed them, I have not tried any stain treatment. The smaller spot is on the back of the right thigh and the larger spot is on the right leg, above the knee. Other than these two places, the Jeans are in excellent condition! No holes/overstretch or fabric runs