In a major move to consolidate the basic side of the apparel industry, Gildan Activewear Inc. has agreed to buy HanesBrands Inc. in a cash and stock deal that values the innerwear giant stock at $2.2 billion.

The deal would nearly double Gildan’s revenue, but there could be antitrust hurdles because both companies sell underwear, hosiery and shirts.

Gildan Activewear has entered into a definitive agreement to pay $2.2 billion for HanesBrands in a deal that places its enterprise value at $4.4 billion.