Featuring Merino 150, Smartwool's lightweight weight Merino wool, which has been wrapped around a nylon core for durability, this baselayer provides next-to-skin comfort. It's soft, lightweight and breathable, allowing sweat to move away from the skin to keep you dry. It acts as a versatile high-performance layer for warmer conditions. The baselayer offers stretch and a full range of motion while following the contours of the body. It's flattering on all body types.Slim fit - flattering on all body shapes, follows the contours of the bodyLightest weight Merino jersey with a nylon core - increases durability while still keeping 100% Merino wool next to skin for comfortMerino 150 - breathable, soft, lightweight fabric offers next-to-skin comfort, moves sweat away from the body, and acts as a versatile performance layer for warmer conditionsStretch merrow stitching designed to elevate comfort, range of motion, and fitPrincess seams on front and back panels designed for figure-flattering fit8.25" (21 cm) center-front zipper with semi-locking sliderMaterial: 88% Merino Wool, 12% Nylon (exclusive of decoration)Colour: Light Grey