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A cushion includes a first cushion portion, a second cushion portion, and a connecting portion interconnecting the first cushion portion and the second cushion portion such that the first cushion portion and the second cushion portion are brought to an open position to unfold the cushion. The first

A cushion includes a first cushion portion, a second cushion portion, and a connecting portion interconnecting the first cushion portion and the second cushion portion such that the first cushion portion and the second cushion portion are brought to an open position to unfold the cushion. The first cushion portion and the second cushion are movable to a closed position to fold the cushion along the connecting portion into a generally rectangular parallelepiped. The connecting portion is provided along one corner of the generally rectangular parallelepiped and interconnects one end of a first surface of the first cushion portion and one end of a first surface of the second cushion portion. An inclining surface of the first cushion portion and an inclining surface of the second cushion portion are both planar surfaces.

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1. A cushion comprising: a first cushion portion;a second cushion portion; anda connecting portion interconnecting the first cushion portion and the second cushion portion such that the first cushion portion and the second cushion portion are brought to an open position to unfold the cushion, the fi

1. A cushion comprising: a first cushion portion;a second cushion portion; anda connecting portion interconnecting the first cushion portion and the second cushion portion such that the first cushion portion and the second cushion portion are brought to an open position to unfold the cushion, the first cushion portion and the second cushion portion being movable to a closed position to fold the cushion along the connecting portion into a generally rectangular parallelepiped,wherein the first cushion portion comprises:a first surface defining one side of the generally rectangular parallelepiped;an inclining surface extending obliquely from one end of the first surface; anda second surface extending at a generally right angle from an opposite end of the first surface,wherein the second cushion portion comprises:a first surface defining another side of the generally rectangular parallelepiped different from the one side;an inclining surface extending obliquely from one end of the first surface of the second cushion portion; anda second surface extending at a generally right angle from an opposite end of the first surface of the second cushion portion,wherein the connecting portion is provided along one corner of the generally rectangular parallelepiped and interconnects the one end of the first surface of the first cushion portion and the one end of the first surface of the second cushion portion in a state where the cushion is folded into the generally rectangular parallelepiped,wherein the inclining surface of the first cushion portion and the inclining surface of the second cushion portion are both planar surfaces,wherein in a state where the cushion is folded into the generally rectangular parallelepiped, a curved surface of the first cushion is continuous with the inclining surface of the first cushion portion at an end of the inclining surface opposite from the connecting portion, and is away from the inclining surface of the second cushion portion,wherein the cushion has three modes, the three modes being a folded mode, a first unfolded mode, and a second unfolded mode, the folded mode being a mode in which the cushion is folded into the generally rectangular parallelepiped with the inclining surface of the first cushion portion and the inclining surface of the second cushion portion contacting each other to form a gap between the curved surface of the first cushion portion and the inclining surface of the second cushion portion, the first unfolded mode being a mode in which the first surface of the first cushion portion and the first surface of the second cushion portion are both in contact with a ground surface, and the inclining surface of the first cushion portion and the inclining surface of the second cushion portion are opposed to each other, and the second unfolded mode being a mode in which the inclining surface of the first cushion portion and the inclining surface of the second cushion portion are both in contact with the ground surface, and the first surface of the first cushion portion and the first surface of the second cushion portion are opposed to each other,wherein, in the first unfolded mode, a height of the second surface of the second cushion portion is greater than a height of the second surface of the first cushion portion, so that inclining surfaces having different heights are formed to be opposed to each other, andwherein, in the second unfolded mode, both the first surface of the first cushion portion and the second surface of the second cushion portion are formed to be opposed to a user. 2. The cushion of claim 1, wherein in the folded mode, the first cushion portion and the second cushion portion are locked to each other by a hook-and-loop fastener. 3. The cushion of claim 1, wherein the first cushion portion and the second cushion portion both comprise cushion bodies covered by a cover, and the cover has a pocket formed therein. 4. The cushion of claim 2, wherein the first cushion portion and the second cushion portion both comprise cushion bodies covered by a cover, and the cover has a pocket formed therein.