Abstract: In order to concentrate the creases, which are inevitably produced at the front sheet member of seat proper when the front section of the seat proper takes its lowermost position by the function of the adjustable femur supporter, at an inconspicuous portion of the front sheet member, two elongate elastic members constructed of, for example, a rubber material are attached to the sheet member in a manner to be kept expanded even when the front section of the seat proper takes the lowermost position. Each elongate elastic member passes through two slots formed in the sheet member so that a portion of the elongate elastic member is located at a side opposite to another side where a major portion of elongate elastic member is located.

Abstract: A seat part cover for a seat part of a seat has an upper portion to cover the top surface of the seat part, front and side portions extending downwardly from the upper portion to extend over the front and side surfaces of the seat part, and a band portion extending between the side portions for positioning around the rear surface of the seat part. The band portion is unattached to the upper portion to provide an opening between the band portion and the upper portion at the rear thereof. A flap portion extends from the front portion to extend beneath the seat part from the front to the rear, the flap portion being securable to the upper portion at the rear thereof.

Abstract: A conformable seatback cover adapted for ease in installation while retaining a professionally fitted appearance, and constructed of heavy, non-stretchable material. The conformable structure of the cover is developed by prestructured front and back panels which correspond generally in dimensions to the front and back surfaces of a vehicle seatback, the tight fitting appearance being accomplished by the use of stretchable side panels which join the respective front and back surfaces in a snug fit to said seatback.