In the present invention, the synthetic resin constituting the microfiber and the water-soluble polyester resin eluted are formed of island-in-the-sea yarn, and the synthetic resin is any one or two or more of polypropylene, polyethylene, polyester, and polybutylene terephthalate, and the water-soluble polyester resin Is an eco-friendly water-soluble polyester-based island-in-the-sea yarn composed of polymers of diols including terephthalic acid, isophthalic acid, and dimethyl 5-sodiosulfo isophthalate and diols including ethylene glycol, diethylene glycol, neopentyl glycol, and polyethylene glycol. It is about.
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