"headrests" is probably misspelled. Trying headrest instead Definition of headrest
headrests
1. [ noun ] a cushion attached to the top of the back of an automobile's seat to prevent whiplash
Synonyms: head_restraint
Related terms: cushion car_seat
2. [ noun ] a rest for the head
Related terms: rest
Similar spelling:   headrest
  headdress
  headrace