The On Running Challenger Vest is a practical model for whenever you need extra comfort and don't want to sacrifice modern style Eco-friendly materials and a minimalist design will allow you to be comfortable with the environment in mind. Made from lightweight materials whose raw material is recycled. Specially designed chambers effectively prevent heat loss. Synthetic insulation derived from 100% recycled bottles insulates against the cold, retaining its properties even in damp conditions. Zipped waistcoat. Side pockets with zips. Decorative zip opening on back for ventilation. Faux leather insert with ON logo on side at chest. Mens insulated vest On Running Challenger 1MD30040553-black