The ULTRA-PAK Jacket is exactly that! The ultimate light weight waterproof & breathable shell, weighing only 7 oz. The “UP” is designed for ultimate self packability. Perfect for the golf bag, backpack, or boat locker. Made with Hydropore1.5 breathable technology, the “UP” is High Tech Comfort and Performance at a terrific value. It’s like nothing you’ve ever worn before.