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Weightless vest to weatherproof your run.Protective, not restrictive - Relax on your run knowing you're protected from the elements in this ultra-lightweight Weather Vest. It's the shield you can trust when you can't rely on good weather.Breathe easy - Weather protection never felt so free. Stay cool and airy when the tempo, or temperature, rises thanks to the vest's breathable front, back and side panels.Smart design - Look and feel unstoppable with featherweight Japanese stretch fabrics that combine function with perfect form. Engineered for both ventilation and visuals, you'll look sharp before, during and after your run.Hidden benefits - With the Weather Vest light in weight doesn't mean light on details. Water-repellant coating on the front means you're always ready for rain, while waterproof-zippered pockets keep your valuables secure and dry. Reflective elements come to light after dark to help you stay seen and safe.Fabric Facts - ++ lightweight Japanese stretch-fabrics ++ highly protective and tear-proof upper fabric 100% polyamide ++ ultralight ripstop main fabric ++ front fabrics with advanced DWR (durable water repellent) coating ++ back panel with ventilation holes for endurance-level breathability ++Weatherproof - Stay warm and dry in On’s weatherproof running gear. It is crafted from premium materials and applies function where you need it. Bonded where needed, protective fabrics blend with ventilation. This means the right balance between protection, breathability and freedom of movement.