Technical Notes Built from lightweight ripstop fabric, this jacket is designed for protection without compromise. Water-resistant and windproof, it shields you from the elements while remaining breathable. It packs down into its own hood pocket for convenience on the move. Colour Notes Introducing Riverstone, a luxury marble-grey for all season performance. Size Guide Ramone is 6ft with a 42" chest and wears M. Shai is 6ft2 with a 38" chest and wears M. Lightweight Running Jacket with water-resistant, windproof construction. Breathable fabric provides protection without compromise. Packable design with functional pockets. Premium running jacket from Acid Running in Riverstone Beige. Lightweight Running Jacket with water-resistant, windproof construction. Breathable fabric provides protection without compromise. Packable design with functional pockets. Premium running jacket from Acid Running in Riverstone Beige.