Lightweight windproof and water-resistant protection is provided by the insulated jackets use of PERTEX Quantum Eco fabric. The Respond XT Jacket is the new and updated version of our Flux Jacket. Outer: 100% Nylon (recycled); Insulation - core body: 100% Polyester (recycled); Insulation hood, sleeves and side panels: 100% Polyester (recycled); Lining: 100% Nylon (recycled).