* Hair on the body: This is the most common usage. For example, "les poils du bras" (the hair on the arm).
* Hair on animals: For example, "le poil d'un chien" (the fur of a dog).
* Hair as a material: For example, "un tapis en poil de chèvre" (a goat hair rug).
It's important to note that "poil" is a masculine noun.