PROBLEM TO BE SOLVED: To provide an ultrafine fiber filament bundle having excellent water repellency even without undergoing a water-repellent post-processing treatment.;SOLUTION: A water-repellent ultrafine fiber bundle is provided which comprises a thermoplastic resin having a surface tension of 40 mN/m or less. The single fiber diameter of fibers comprising the thermoplastic resin is 50 to 1500 nm and the coefficient CV of variation of the fiber diameter is 30% or less. A fabric is also provided which comprises the water-repellent ultrafine filament bundle.;SELECTED DRAWING: Figure 1;COPYRIGHT: (C)2020,JPO&INPIT
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