PROBLEM TO BE SOLVED: To provide a duvet in which the fitting property to a body in the use can be improved further.;SOLUTION: A duvet F1 is formed in a two-layer structure having a feather layer, and a floss silk layer disposed to cover an outer peripheral side of the feather layer over an entire circumference thereof. The feather layer is defined from the floss silk layer by a bag-shaped partition wall to each other. An outer bag part 9 covering up an outer peripheral side of the floss silk layer is configured so that an inner surface is hard to let the floss silk layer slide. Tacks are formed on at least the outer bag part 9 and the floss silk layer in the locking at the side of short sides 9a, 9b in the outer bag part 9, and thereby a pair of locking parts 10L, 10R is formed in which longitudinal dimensions of the short sides 9a, 9b can be narrowed. The locking parts 10L, 10R are formed in a position shifted toward outside of the left and right from the center of the short sides 9a, 9b and in at least two places becoming symmetric substantially.;COPYRIGHT: (C)2015,JPO&INPIT
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