The invention relates to a headrest for a vehicle seat, comprising a central part containing a cushion support and a cushion that is held on top of a seat back by means of at least one support rod, the front region of said headrest having a head support region. The method can include, but is not limited to, removing at least a portion of earth disposed above a subterranean structure to provide a foundation; depositing an isolation layer above the subterranean structure; and depositing at least a portion of the removed earth, a fill material or both to at least partially cover the isolation layer. The composition may further comprise an epoxy resin curing agent.