FEATURES of the Smartwool Women's NTS Micro 150 Pattern Crew Jersey knit: UPF 30 Stretch marrow stitching for comfort and a feminine aesthetic Side seams wrap to front for body-enhancing fit Interior heat transfer logo for next-to-skin comfort Heat transfer SmartWool logo at left hip SPECIFICATIONS of the Smartwool Women's NTS Micro 150 Pattern Crew Form Fit 100% Merino Wool Garment Weight: 4.94 oz / 140 g Fabric Weight: 4.5 oz/yd2 / 150 gm/m2