Our HELLY TECH® Performance system is waterproof/breathable and windproof. HELLY TECH® PERFORMANCE. Shell: 89% Polyamide (Recycled), 11% Elastane- Lining: 100% Polyamide (Recycled)- Insulation: 100% Polyester- Insulation hood: 100% Polyester (Recycled)- Insulation hood: 50% Duck Down, 50% Polyester.