An object of the present invention is not bulky easy attachment and detachment, yet to provide a high insulation inner best. Worn under A jacket, a back body 11, and an inner vest 10 consists and a left front body 12 and the right front body 13 connected to the after body 11 that, ventilation sheer At sexual good mesh material, the back pockets 14A along with configured to open structures before using the fasteners 17, and holds it houses the thermal material 18, 14B, shoulder pocket 15A, 15B, abdominal pockets 16A, 16B and those that are provided. .BACKGROUND 2
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