Manufactured from a new material developed by Rooster in conjunction with a leading technical fabric manufacturer. This top has a Polyurathene coating on the outside for water resistance, durability and flexibility combined with a fleece inner layer to keep you snug and warm - a combination that works well when wet or dry. It can either be worn under your hikers as a base layer, mid layer or as a top layer over them. This really has got to be one of the most exciting products that we have ever developed! This product is machine washable. We recommend that you turn it inside out, wash on gentle(30C). You can also tumble dry it too - again we recommend you tumble dry it on the low heat setting.