Terramar HOTTOTTIES Thermawool Superfine Merino Wool V-Neck Shirt - Women's Wool Constructed of Thermawool 100% mercerized supersoft merino wool jersey, a Terramar-exclusive fabric. 1x1 rib trim. Set-in sleeves. Unique natural qualities include breathable moisture management and anti-microbial odor control. Flatlock seam construction for comfort and durability; soft and non-chafing next to skin.