Shasta County Sheriff Tom Bosenko said Wednesday that the Spanish-speaking suspects also kept the head of 34-year-old Sherri Papini covered during much of her ordeal.
Papini went missing Nov. 2 while jogging near her home in Redding. She was dropped along Interstate 5 near Sacramento on Thanksgiving.
Bosenko said authorities are trying to do a sketch of the suspects based on Papini's limited recollections.
Papini told investigators one of the women had long curly hair, thin eyebrows and a thick accent. The older suspect had straight black hair and thick eyebrows.
Bosenko urged anyone with information on the case to come forward and told residents to stay cautious until the suspects are identified.