You can shop here a set or single piece undergarment from some top brands as per your requirement and preference. Gildan has their own manufacturing facilities in Rio Nance and the Caribbean. This company supplies branded and private label athletic, casual, and dress socks to retail companies in the United States. Navy blue is the most common color for denim and dress pants. Our collection for Gildan Navy Blue Underwear for men is including Everyday and Casual and more style. Shop for the best suitable style online.