Amazon muscling into sportswear with its own labels

New York

AMAZON.COM is tapping some of the biggest athletic-apparel suppliers to make a foray into private-label sportswear, according to people familiar with the matter, setting the stage for further upheaval in an already-tumultuous industry.

Makalot Industrial, a Taiwanese vendor that produces clothing for Gap, Uniqlo and Kohl's, is making apparel for the Amazon line, a person with knowledge of the arrangement said.

Eclat Textile, another Taiwanese supplier, is contributing to the effort…