Abstract: A vehicular seat, a watercraft seat, a method for making the vehicular seat, and a method for making the watercraft seat that can achieve a favorable riding comfort, reduce the number of work processes involved, and reduce a manufacturing cost even by foaming a first cushion member of urethane on a second cushion member of a thermoplastic elastomer to make an integrated assembly of the first cushion member of urethane and the second cushion member. A vehicular seat includes a first cushion member formed of urethane and covered with a seat skin and a second cushion member formed of a thermoplastic elastomer and disposed between the first cushion member and a bottom plate. A covering sheet is disposed between the first cushion member and the second cushion member.

Abstract: A seat for a vehicle and a seat for a watercraft include a polyurethane-made first cushion body covered with a seat skin. A thermoplastic elastomer-made second cushion body is disposed between the first cushion body and a bottom plate 43. The relationships of t1<t2, 5 mm?t1?30 mm, and 20 mm?t2?50 mm are established, where t1 is the material thickness of the first cushion body, and t2 is the material thickness of the second cushion body. The resulting configuration provides a seat for a vehicle and a seat for watercraft which are capable of securing a good ride comfort.

Abstract: A seat for a vehicle and a seat for a watercraft include a polyurethane-made first cushion body covered with a seat skin. A thermoplastic elastomer-made second cushion body is disposed between the first cushion body and a bottom plate 43. The relationships of t1<t2, 5 mm?t1?30 mm, and 20 mm?t2?50 mm are established, where t1 is the material thickness of the first cushion body, and t2 is the material thickness of the second cushion body. The resulting configuration provides a seat for a vehicle and a seat for watercraft which are capable of securing a good ride comfort.