The American Airlines uniforms by Twin Hill

American Airlines has a gripe with Tailored Brands.

More than 2,000 flight attendants have had negative reactions to uniforms manufactured by Tailored Brands’ Twin Hill division, which reported in September that it was outfitting more than 70,000 of the airline’s flight attendants, customer service agents and service representatives, according to published reports.

In a letter to American’s general counsel, Bob Ross, president of the Association of Professional Flight Attendants, wrote that the uniforms have caused a variety of health issues, including eye swelling, rashes, skin blistering, headaches and more, the reports said.

The union called on the airline to stop issuing the uniforms, reimburse flight attendants for medical leave and establish a fund to test the uniforms. American in turn said it has already run three rounds of tests on the uniforms and a spokesman told NBC News: “We are confident our uniforms are safe, and we continue to encourage any of our team members who suspect a reaction to the uniform to contact their manager.”

Tailored Brands said the uniforms were designed to be “elegant and modern yet reminiscent of a bygone era of luxury travel” and, while stylish, are intended to stand up to the rigors of the job.

The company did not respond to requests for comment on Friday about the complaints.