Unless you pack an industrial-sized garbage bag to cover everything from your head to toes once it starts to rain, you're going to want to add the Mountain Equipment Women's Odyssey Pants to your rain gear. Their lightweight design and three-layer waterproof and breathable shell protect your gams from some of the worst weather you'll encounter out there and weigh less than ten ounces, so you can just pack them back in your pack once the storm clears out. A trim fit reduces bulk and weight, while the addition of full-length leg zips allow the pants to be pulled on over boots and layers without too much hassle.