This v-neck style is cut for a close-to-the-skin fit, knitted from our signature all-season Merino wool. Slim fit. V-neck. Responsible Wool Standard Certified (Control Union Certifications CU 862581): 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. Certified by NSF Certification, LLC C0517447