Merc London Cotton Harrington Jacket in Olive Green. The Merc Harrington is more than a jacket-it has become a ubiquitous part of generations. Crafted from a durable cotton blend canvas, this garment is designed to last. To keep things casual, pair it with jeans and a top. Full Zip Front Modern Fit Button Collar 60% Cotton, 40% Polyester, Lining: 100% Cotton. Colour: green