Genuine US Military Issue Improved Wet Weather ACU Digital Pant, NEW W/Tags or NEW Issued The Improved Rain Suit trousers have a draw-string at the waist, a center zipper, pass through pockets, Velcro closures at the ankles, and long leg zippers for easy on-off. The seat and knees are reinforced. The Parka, Improved Rain Suit replaces the Parka, Wet Weather, Lightweight and the Trousers, Improved Rainsuit replace the Trousers, Wet Weather, Lightweight. The Improved Rainsuit is less bulky and better fitting than the parka/trousers it replaces. Initial fielding of the Improved Rain Suit (IRS) to high priority Army units began in Dec 1997, managed by Product Manager-Enhanced Soldier System (PM-ESS), Ft. Belvoir, VA. The IRS is issued one per Soldier in all units. The primary vendor was ORC Industries, Inc.