Logan Long Sleeve Merino Wool Half Zip Sweater. This women’s long sleeve half zip sweater features 100% natural merino wool. Ideal for travel, outdoor activities, business, and casual wear. This staple sweater fuses style with functionality. Made of extra-fine merino wool creating incredible softness and luxury. This half zip is lightweight, soft, non-itchy, warm in the cold and cool in the heat, and has a miraculous ability to resist odor.