Gildan Activewear Inc is located in Long Sault, Canada on 16290 Post Rd. Gildan Activewear Inc is rated 3.7 out of 5 in the category retail in Canada. Gildan Activewear Inc. is a Canadian manufacturer of branded clothing, including undecorated blank activewear such as t-shirts, sport shirts and fleeces, which are subsequently decorated by screen printing companies with designs and logos.