In a statement on its website, Lululemon said, "At the beginning of March, our stores and ecommerce site received some black luon women's bottoms that didn't meet our high standards. The materials used in construction were the same, but the coverage was not, resulting in increased sheerness."
The company pulled about 17 percent of the pants, saying "there will be a shortage of these styles in our stores and online until our new stock arrives."
Refunds are being offered to customers to already bought pants made with the fabric.
"We want you to Down Dog and Crow with confidence and we felt these pants didn't measure up," the company said in its statement.
Lululemon's stock fell $2.19 to $63.73 after the announcement. The company ranks fourth among the most profitable stores in the U.S., according to RetailSails, coming in behind Coach, Tiffany and Apple.
ABC News and The Associated Press contributed to this report.