Various embodiments according to the present invention include a male surface fastener member is configured to be molded on the mold surface of the foamed resin body. And fastening the male sphere surface member includes a plurality of the male surface fastener strips attached to each other end-to-end relationship by a connecting portion formed integrally with at least the end of the male surface fastener strip of each and every fall. Fastening each of the male surface sphere strip from the first surface along the width direction of the base material between the base material having a first surface on which a plurality of coupling elements which extend upwardly, the first and second longitudinal resin permeation prevention wall the upwardly extending first and second in effect comprises a lateral wall prevent resin infiltration. Each lateral prevent resin penetration wall includes a plurality of engagement elements arranged in a row in the width direction of the first surface.