Abstract: It is an object of the present invention to provide fibers, a clothing fabric, and underwear which can maintain excellent cool contact feeling, texture, and pleasant feeling and can suppress fiber yellowing and reddening in distribution process or during in use. The present invention provides fibers containing a thermoplastic elastomer, an acidic compound, and a phosphorus antioxidant, wherein the acidic compound is a styrene-maleic anhydride copolymer or an acid anhydride and the acidic compound is contained in an amount of 0.1 parts by weight or more per 100 parts by weight of the thermoplastic elastomer.

Abstract: It is the object of the invention to provide a fiber excellent in cool contact feeling which is excellent in hand and skin touch and capable of preventing unpleasant feeling in the wet state and a woven fabric, clothing, and underwear excellent in cool contact feeling and obtainable by using the fiber excellent in cool contact feeling. The invention is a fiber excellent in cool contact feeling, which contains a thermoplastic elastomer and an inorganic filler.