A classic turtleneck sweater in the color black, knitted from our signature extra-fine Merino wool using a ribbed-knit stitch to enhance its extra-close cut. Slim fit. Responsible Wool Standard Certified: This global standard protects the sheep that supply the wool for this garment as well as the land they graze, working to make it better for the environment and the sheep. NSF Certification C0517446 Size: XXS (see photos for measurements) Material: 100% extra fine Merino wool.