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An outer layer is simply an extra layer of warmth. When the wind chill factors kick in or the temperature plummets below zero, your regular lightweight layers may need a helping hand. So a thicker, fleece-like outer layer will help you laugh at the cold. Here at ioMerino, our range of incredibly warm and comfortable Merino Wool outer layers will help you do just that. Shop men's and women's Merino outer layer hoodies, jackets, vests, tracksuit pants and more.