With the addition of Merino Wool and earth tone colors, this lightweight Crew sock fits like nothing else out there. Patented SynchroKnit™ construction drops stitches out of the knitting process to create a sock that is shaped like a foot and not like a tube. This allows for proper support and a contoured fit to be applied. Guaranteed not to slip or slide around in your shoe. This is the most precise fit available anywhere.