Ultra-Pak Small Rain Pants (UP32101-10-SM) by Compass 360®. The Ultra-Pak Waterproof Pants are exactly that, ultimate lightweight, waterproof, and breathable pants that weigh only 6 oz. The Ultra-Pak is designed for self packability with the ability to be stuffed and zippered into the Ultra-Pak Jacket self storage pocket, making it great for the golf bag, backpack, or boat locker. Made with Hydropore1.5 breathable technology and other features such as a fully vented back plaquet, the Ultra-Pak provides high-tech comfort and performance. These pants also feature 4 panel construction for a better fit, zippered leg openings, and an adjustable elastic waist with draw cord and lock.