Eastern Mountain Sports Waterproof Jacket System Three Size Medium

In good clean condition System Three System Three is a waterproof, breathable laminate used by Eastern Mountain Sports. In addition to being highly effective at blocking water and wind while allowing perspiration to escape, it comes at a great value. That can be the downside of waterproof, breathable technology—while it’s absolutely necessary to have in a wide variety of outdoor activities, it can be pricey. After all, extensive product testing in simulated adverse conditions isn’t cheap. But Eastern Mountain Sports is dedicated to offering a wide range of items at a reasonable price, without having to sacrifice quality.