From Ardrana

Sometimes confused with the abominable snowman, the yeti is a distant cousin to the great carnivorous apes of warmer climates.

An adult yeti stands 8 feet tall and is covered in long, white fur. Their feet and hands are wide and flat, which helps to disperse their great weight (about 300 pounds) on treacherous snow fields. They travel on all fours like the apes, but fight very comfortably standing erect. Unlike most apes and gorillas, the yeti does not have an opposable toe on its feet. They wear no clothing or ornamentation. The spoor, or smell, of a yeti is very subtle in cold climates, but in confined or warm areas, they have a strong, musky odor. The eyes of a yeti are icy blue or almost colorless. Their claws and flesh are ivory white. Unlike many arctic creatures, the yeti does not have a thick layer of body fat to keep it warm. Instead, it relies upon the special properties of its thick, warm fur. It has a transparent second eyelid, which allows the creature to see in blowing snow, and prevents its eyes from freezing in extreme temperatures.

Yeti claws and teeth have value only because of the rarity of the creature. They sell for about a gold piece a tooth or claw on the open market. Yeti fur is another story. It is prized by those living in cold climates for its extraordinary ability to keep its wearer warm. A full grown yeti pelt can fetch up to 300 gold pieces on the open market.

Note: Yeti originally appeared in this form in the 2nd Edition Monstrous Manual for the AD&D game from TSR. Their use here is for the purposes of providing context for the campaign only.