The Dynafit WP 2.5L is a lightweight rain jacket that will keep you and your stuff protected and dry. This new alpine jacket is made with Dynashell 2.5L fabric that is superlight, breathable and totally waterproof thanks to fully taped seams. The 2.5L denotes it's 2 and 1/2 layer membrane fabric that is a more breathable version of traditional 3 layer waterproof-membrane fabrics. This jacket integrates an innovative “zip-over” backpack system. That means even when it rains hard, your pack and its contents are protected from moisture. The durable and still soft outer material enables you to also wear a pack on top of the jacket. The fabric has a very soft handfeel, is thin and has a small degree of stretch for more comfort and less restriction during activity. For additional breathability, there are laser perforations under the arms. Reflectivity ensures visibility in poor weather. When the jacket is not needed, it can be quickly packed small and stowed in its own hood. Nothing is going to touch your stuff with the Alpine WP 2.5L Jacket on!