Rambouillet is a close relative of Merino with a staple length of 2–4 inches. A few years back, I bought my first raw Rambouillet fleece. That fleece was white and had a staple length that was generous enough to comfortably comb. It was so soft and springy.
The chocolate Rambouillet fleece I have now has plenty of bits that are just over 1 inch long. It’s just not suitable for combing. This wool has great crimp and bounce.