Spacer panel for vehicle seat

A spacer panel for a rear side of a seat backrest of a vehicle includes a support structure having a first end and a second end with a tapered section extending from a first portion of the support structure to the first end of the support structure. The support structure is configured to be attached to the rear side of the backrest of the seat. The spacer panel has a honeycomb plastic structure with a thickness varying along a length of the support structure from the first end to the second end of the support structure. A gap hider is associated with the seat such that when the seat is folded, an outer surface of the spacer panel and an upper surface of the loading floor of the vehicle remains in line and oriented at the same angle forming an extended load floor and also providing support to the gap hider.