Why this jacket? It's ripstop, ultra lightweight and packable. Nike also added a water-repellent finish and a mesh vent at the back for breathability. Loose enough to wear over a base, it packs down into its own zippered pocket when you need to shed a layer. Fit & Design: This lightweight woven shell has a water-repellent finish to help keep you dry on the trail and off Side mesh panels and a back vent add extra airflow to help you stay cool This jacket packs down into the zippered chest pocket for compact storage when not in use Reflective details Locker loop Additional Details: This product provides UVA and UVB protection from the sun only in the areas covered by the garment