September 16, 2013

Responsibility

Gildan Activewear Included in Dow Jones Sustainability World Index

Montréal, Monday, September 16, 2013 – Gildan Activewear Inc. (GIL; TSX and NYSE) today announced that the Company is one of only two North American companies to be included in the Dow Jones Sustainability World Index in the Textiles, Apparel and Luxury Goods sector, with effect from September 23, 2013.

The Dow Jones Sustainability Indices (DJSI) track the financial performance of the leading sustainability-driven companies worldwide. These indices serve as benchmarks for investors who integrate sustainability considerations into their investment philosophy. The annual DJSI review is based on a thorough analysis of corporate economic, environmental and social performance carried out by RobecoSAM, an investment specialist focused exclusively on sustainability investing. The analysis covers issues such as supply chain standards and labour practices, environmental policy/management systems, corporate governance and risk management.

“We are proud to be recognized for our commitment to sustainability by our inclusion in this prestigious global index,” commented Glenn Chamandy, President and Chief Executive Officer. “All of our stakeholders can continue to have confidence that our vertical manufacturing and supply chain business model allow us to ensure that the Gildan family of branded products are manufactured in safe and responsible working conditions, which is now further reinforced by our inclusion in the Dow Jones Sustainability World Index.”

To learn more about Gildan’s various programs and initiatives related to sustainability, please visit www.GenuineGildan.com.

About Gildan

Gildan is a leading supplier of quality branded basic family apparel, including T-shirts, fleece, sport shirts, socks and underwear. The Company sells its products under a diversified portfolio of Company-owned brands, including the Gildan®, Gold Toe® and Anvil® brands and brand extensions, as well as under license agreements for the Under Armour® and New Balance® brands. The Company distributes its products in printwear markets in the U.S. and Canada, where Gildan® is the 2 industry-leading brand, and the Company is increasing its penetration in international printwear markets. The Company is also one of the largest suppliers of branded athletic, casual and dress socks for a broad spectrum of retailers in the U.S. In addition to socks, the Company is developing Gildan® as a consumer brand for underwear and activewear.

Gildan owns and operates vertically-integrated, large-scale manufacturing facilities which are primarily located in Central America and the Caribbean Basin to efficiently service the replenishment needs of its customers in the printwear and retail markets. Gildan has over 33,000 employees worldwide and is committed to industry-leading labour and environmental practices in all of its facilities. More information about the Company and its corporate citizenship practices and initiatives can be found at its corporate websites www.gildan.com and www.genuinegildan.com, respectively.

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Investor inquiries :

Jessy Hayem, CFA

Vice-President, Head of Investor Relations

(514) 744-8511

Media inquiries :

Geneviève Gosselin

Director, Global Communications and Corporate Marketing

(514) 343-8814