Official Macatawa Bay Yacht Club Storm Tech Vest. FABRIC: Shell: 94% Polyester / 6% Spandex Bonded with 100% Polyester Microfleece and Membrane, 320g/m² Waterproof: 7,000mm Breathability: 3,000 g/m²/24 hr PERFORMANCE FEATURES: H2X® Waterproof/Breathable Outshell, 2-Ply Bonded Micro-Polyester Shell, Zippers with Puller Garage, Laser-Cut Welded Adjustable Cuffs, Adjustable Single-Hand Drawcord at Bottom, Inside Facing Draft Flap