; Please refer to the On Running Men's Apparel Size Chart for accurate sizing. A perfect cover for your nature trails, the On Ultra Jacket offers extended comfort while you are outdoors. Flawlessly cut lines, hem, and elastic cuffs offer added protection. Two pleats at the back create space for a running vest or small backpack below the jacket. It has front handwarmer pockets, an attached hood, and front zip closure. Fabric: Main: 82% polyamide, 18% elastane; Insert: 82% polyamide, 18% elastane. Machine wash. Imported.