A seat pad (10) of the present invention includes a placement surface (11). A lateral slit portion (15) which extends from an outer side of the seat pad (10) toward an inner side thereof is formed in a first lateral direction (B1) along the placement surface (11), and at least a portion of the lateral slit portion (15) gradually becomes larger from the outer side of the seat pad (10) toward the inner side thereof in a thickness direction (H) orthogonal to the placement surface (11) along the first lateral direction (B1).

Resilient cores preferably for inflatable bodies having resilient slabs that define a plurality of generally columnar holes or resilient arrays of generally columnar solids. The cores further include thermal transmission mitigation materials or treatments means for improving a core's resistance to heat transfer beyond the core's innate insulative properties. Non-exclusive and non-exhaustive examples of such thermal transmission mitigation materials or treatments in slab core embodiments include consideration to hole or bore geometric cross section, frequency, pattern and orientation, the introduction of a thermal barrier at or within at least some holes or bores, and/or slab material selection/treatment. Non-exclusive and non-exhaustive examples of such thermal transmission mitigation materials or treatments in array core embodiments include consideration to the geometric cross section, frequency (density), pattern and orientation of the solids, the introduction of thermal barriers within inter-solid spaces and/or solid material selection treatment.

Resilient cores preferably for inflatable bodies having resilient slabs that define a plurality of generally columnar holes or resilient arrays of generally columnar solids. The cores further include thermal transmission mitigation materials or treatments means for improving a core's resistance to heat transfer beyond the core's innate insulative properties. Non-exclusive and non-exhaustive examples of such thermal transmission mitigation materials or treatments in slab core embodiments include consideration to hole or bore geometric cross section, frequency, pattern and orientation, the introduction of a thermal barrier at or within at least some holes or bores, and/or slab material selection/treatment. Non-exclusive and non-exhaustive examples of such thermal transmission mitigation materials or treatments in array core embodiments include consideration to the geometric cross section, frequency (density), pattern and orientation of the solids, the introduction of thermal barriers within inter-solid spaces and/or solid material selection treatment.

A seat pad (10) of the present invention includes a placement surface (11). A lateral slit portion (15) which extends from an outer side of the seat pad (10) toward an inner side thereof is formed in a first lateral direction (B1) along the placement surface (11), and the lateral slit portion (15) is curved and thereby protrudes in a thickness direction (H) orthogonal to the placement surface (11).

A seat pad (10) of the present invention includes a placement surface (11). A lateral slit portion (15) which extends from an outer side of the seat pad (10) toward an inner side thereof is formed in a first lateral direction (B1) along the placement surface (11), and the lateral slit portion (15) is curved and thereby protrudes in a thickness direction (H) orthogonal to the placement surface (11).

Provided is a seat pad (10) having a placing surface (11), wherein a lateral slit section (15) extending from an outer side toward an inner side of the seat pad (10) is formed in a first lateral direction (B1) along the placing surface (11), and at least a portion of the lateral slit section (15) gradually becomes smaller in a thickness direction (H) perpendicular to the placing surface (11) from the outer side toward the inner side of the seat pad (10) in the first lateral direction (B1).

Provided is a seat pad (10) having a placing surface (11), wherein a lateral slit section (15) extending from an outer side toward an inner side of the seat pad (10) is formed in a first lateral direction (B1) along the placing surface (11), and at least a portion of the lateral slit section (15) gradually becomes smaller in a thickness direction (H) perpendicular to the placing surface (11) from the outer side toward the inner side of the seat pad (10) in the first lateral direction (B1).

A vehicle seat cushion material and a vehicle seat exhibiting excellent moldability and recyclability and providing favorable seating comfortability is described. A cushion material includes a small pad made of resin foam, a pad body integrally stacked on an upper side of the small pad to cover the small pad, made of resin foam, and formed larger than the small pad, and an impregnation layer formed in such a manner that the resin foam of one of the small pad or the pad body is impregnated with an expandable stock solution composition of the other one of the small pad or the pad body and formed at at least a portion of an area between the small pad and the pad body. The impregnation layer is formed on an upper surface and a side surface of the small pad, and the small pad is sterically covered with the impregnation layer.

A vehicle seat cushion material and a vehicle seat exhibiting excellent moldability and recyclability and providing favorable seating comfortability is described. A cushion material includes a small pad made of resin foam, a pad body integrally stacked on an upper side of the small pad to cover the small pad, made of resin foam, and formed larger than the small pad, and an impregnation layer formed in such a manner that the resin foam of one of the small pad or the pad body is impregnated with an expandable stock solution composition of the other one of the small pad or the pad body and formed at at least a portion of an area between the small pad and the pad body. The impregnation layer is formed on an upper surface and a side surface of the small pad, and the small pad is sterically covered with the impregnation layer.

There is disclosed a padded element. In one embodiment, the padded element comprises a molded foam topper portion and a molded foam substrate portion secured with respect to the molded foam topper portion. The molded foam topper portion and the molded foam substrate portion have a different indentation force deflection at 25% thickness when measured pursuant to ASTM 3574-B.sub.1. In another embodiment, the padded element comprises a molded foam topper portion and a molded foam substrate portion secured with respect to the molded foam topper portion via an interference fit.