On Men Zero Jacket - LimeUltralight and packable. This is the all weather, water repellent jacket that ticks all the boxes and tackles all the elements. Materials Main Fabric: 100% Polyamide Underarm: 95% Recycled Polyamide, 5% Elastane Key features Every inch of this breathable jacket is athlete approved Lightweight fabrics for easy, fluid movement Windproof construction to face the elements Water repellent surface for added protection Integrated pocket for packing it all