The North Face Apex Elixir vest is lightweight & highly wind resistant, & has been made using 4-way stretch TNF Apex Aerobic Soft Shell fabric. It also has a DWR finish for good water repellency & features a brushed collar lining, reflective logos, a reversed coil front zip & an adjustable hem cinchcord.GLOSSARY: Apex Aerobic: The lightest, most breathable of TNF's soft shell fabrics, w/4-way stretch.DWR (Durable Water Repellent):A DWR treated fabric will bead-up water on its surface to stop it soaking into the fibres. This maintains breathability & shortens drying times.