4 Direction Stretch comfort, 85% Merino Wool, 15% silver nylon. S3 Silver Shield Science to aid in odor control. High neck style to sit above collar bone to keep the elements out. Hang dry only, machine wash on gentle cycle. 1/4 zip front, Merino Wool added for warmth without the "itchiness" of other wool. Sizes: M-2XL Colors: Black