The Peak Power is outfitted with Omni-Dry , our highest level of waterproof-breathability. This includes an ultra-light laminate membrane that’s over 50-percent air, making this jacket insanely breathable and lighter than other 3-layer shells like it. Other unique innovations include: underarm vents that zip that open to further disperse excess heat, with 2-way zipper pulls that allow you to customize the amount of ventilation. A lapel tab connector that lets you completely unzip your jacket and then fasten it closed at the chest for max ventilation without flaps flopping around. And a sticky, silicone treatment at each shoulder that both protects against the abrasion of your pack straps and keeps them from slipping and sliding around. Laser-cut Invizzip™ zippers on the hand pockets are clean and discreet, and a waterproof front zipper provides added wet-stopping reinforcement.