Abstract: A fiber is a sea-island-type composite fiber in which the primary constituent component of the sea section is an aromatic polyester, the moisture absorption/desorption parameter ?MR is at least 2.0%, and a diagram obtained by connecting the center of gravity of the islands positioned on the outermost periphery of the fiber cross-sectional surface with line segments is a regular polygon having the center of gravity as an apex. A polyester fiber having superior quality with no splitting of the fiber surface caused by dispersion of stress generated due to volume expansion of the fibers when absorbing moisture, no dyeing irregularity or fuzzing when used in a woven or knitted fabric, and no reduction in moisture absorption due to hot-water processing.

Abstract: To provide a garment which can suppress stuffy feeling and heatful feeling in the garment to keep an environment in the garment comfortable and also has excellent wearing comfort and design so that it can be suitably used in a high temperature and/or high humidity environment and in various wearing scenes requiring comfort such as an office, a home and the like, it is provided that the garment made of a fabric having an air permeability of 50 to 500 cm3/cm2/s includes a blower fan unit and a path forming section for imparting directivity to wind in the garment inside the garment.

Abstract: A garment has excellent contact cold sensation and gives persistent contact cold sensation but also can reduce heatful feeling and is suitably wearable in wearing scenes such as offices and homes. The garment includes one or plural fans for taking external air into a space between the garment and the body. A fabric of the garment has a contact cold/warm sensation value Q-max of 0.30 W/cm2 or larger and a basis weight of 250 g/m2 or less.

Abstract: A fan unit for an air-conditioned garment, wherein the fan unit takes external air into an interspace between the garment and a wearer's body, the fan unit including: a fan that blows external air into the interior of the garment; a motor that rotates the fan; a battery that supplies power to the motor; a charging terminal for charging the battery; and a power switch to start and stop the fan unit, wherein the fan, the motor and the battery are housed in a casing, the casing has an air intake port that takes in external air, and an air blowing port that blows the taken-in external air into the interior of the garment, the charging terminal and the power switch are provided on the exterior of the casing, and the casing has a thickness of 5 to 30 mm in an axial direction of the fan.

Abstract: An actuator fiber is made of a thermoplastic resin and has a coil spring shape. A spring index D/d of 1.7 or more when an average diameter of a coil portion is represented by D and a fiber diameter is represented by d. A glass transition point measured by a differential scanning calorimeter may be 150° C. or lower.

Abstract: A polyamide fiber which has a single fiber fineness of less than 5 dtex, and has a stress per unit fineness of 0.7 cN/dtex or more in 3% elongation in a tensile test of the fiber, in which a stress F1 in 3% elongation in a tensile test of the fiber before 100° C. boiling water treatment and a stress F2 in 3% elongation in a tensile test of the fiber after the treatment satisfy Formula (1): F2/F1>0.7??(1).

Abstract: A polyamide fiber which has a single fiber fineness of less than 5 dtex, and has a stress per unit fineness of 0.7 cN/dtex or more in 3% elongation in a tensile test of the fiber, in which a stress F1 in 3% elongation in a tensile test of the fiber before 100° C. boiling water treatment and a stress F2 in 3% elongation in a tensile test of the fiber after the treatment satisfy Formula (1): F2/F1>0.7??(1).