PROBLEM TO BE SOLVED: To provide a heat insulation instrument which gives a good feeling of use and easily puts legs in and out.SOLUTION: The heat insulation instrument 10 includes a cylindrical storing part 12 provided with an upper opening part 22 capable of putting the legs in and out on an upper part, to heat the legs stored into the storing part 12 through the upper opening part 22. The storing part 12 is composed of a plate-like heat insulating material 14 prepared by joining a surface fabric 18 and a back surface fabric 20 on the surface and the back surface of a flexible urethane foam 16 with a flexibility by a flame lamination. In the heat insulating material 14 is set so that the tensile loadings in the surface fabric 18 and the back surface fabric 20 along the vertical direction of the storing part 12 are larger than the tensile loading in the flexible urethane foam 16 along the vertical direction of the storing part 12.COPYRIGHT: (C)2012,JPO&INPIT【課題】使用感が良好で、足の出し入れが容易な保温具を提供する。【解決手段】保温具10は、上部に足を出し入れ可能な上開口部22が設けられた筒状の収容部12を備え、該上開口部22を介して収容部12に収容した足を温めるものであって、前記収容部12は、可撓性を有する軟質ウレタンフォーム16の表面および裏面に表地布帛18および裏地布帛20をフレームラミネートにより接合した板状の保温材14で構成され、前記保温材14は、前記表地布帛18および裏地布帛20における収容部12の上下方向に沿う引張荷重が、前記軟質ウレタンフォーム16における収容部12の上下方向に沿う引張荷重より大きく設定されている。【選択図】図1
