Flexible structure, multilayered extending and contracting sheet, spun yarn and fiber structure body

The invention relates to an flexible structure, a multilayered extending and contracting sheet, a spun yarn and a fiber structure. The aim of the invention is to provide a flexible structure having flexibility while having high stress relaxation property, less in tightening feeling because it returns slowly after stretching, and having fit feeling. There is provided the flexible structure having asurface layer (Z) containing a thermoplastic elastomer (C) laminated on a surface of a core layer (Y) containing a resin composition (X) containing a 4-methyl-1-pentene alpha-olefin copolymer (A) satisfying the following requirement (a). Requirement (a); the copolymer (A) contains a constitutional unit (i) derived from 4-methyl-1-pentene of 50 to 90 mol% and a constitutional unit (ii) derived from alpha-olefin (excluding 4-methyl-1-pentene) of 10 to 50 mol% based on 100 mol% of total of the constitutional unit (i) and the constitutional unit (ii). 本发明涉及伸缩性结构体、多层伸缩片、纺织纱线以及纤维结构体。本发明的目的在于提供一种伸缩性结构体，其具有高的应力缓和性的同时还具有伸缩性，且