At Lands' End we love supima cotton. Soft strong and sumptuous it's conscientiously sourced and American-grown in a way that minimizes environmental impact. The fibers are also 50% longer than typical cotton so it produces are stronger softer yarn that's less prone to fraying and pilling. And it even holds onto color for longer. Experience the magic for yourself with this Women's Long Sleeve Supima Mock Turtleneck. Lightweight and breathable it has an easy-care finish and is machine washable.