Whether you head off in the rain or just know that it is gonna hit before the summit, rock the Outdoor Research Aspire II Jacket. This jacket thrives on hikers and backpackers backs thanks to its waterproof and breathable GORE-TEX Paclite 2L laminate that seals out weather while still packing down small when not in use. Long TorsoFlo vents allow you to control your climate while you work up a sweat.