The Craghoppers Mens Stefan Trousers are lined stretch waterproof trousers designed with all weather hikes in mind. The AquaDry Membrane is waterproof, windproof and highly breathable. It is a specially designed dual layer fused waterproof fabric that stops water from passing through it while allowing water vapour to escape. The membrane is fused onto the durable outer face fabric which is also treated with a DWR (Durable Water Repellent) finish. This has a Hydrostatic Head waterproof rating of 20,000mm. The insulating fabric provides warmth by trapping warm air, ensuring body heat is maintained while being lightweight. The advanced insulating fabric is warm, quick drying and highly durable, making it ideal as an insulating layer for a wide range of activities.