The Casual Crew is cushioned throughout the toe/heel and arch for extra comfort , especially in shoes that have no cushion in their construction. FITS patented Full Contact Fit hugs the contours of your foot and stays put so there are no loose socks to constantly have to pull up. Mild compression around the foot and leg for an invigorating feeling. Crew height comes just below the calf. Super-fine Merino Wool 65% Nylon 27% Polyester 6% Lycra 2%