Patent pending ReliaWool Technology in high impact areas provides the longer lasting protection to keep feet comfortable. 1.75" overall height, 1x1 ribbed welt, achilles pad * 69% Merino Wool, 29% Nylon, 2% Elastane, washer and dryer friendly * Women"s sock sizes Small (shoe size 4-6.5) Medium (shoe size 7-9.5) Large (shoe size 10-12.5) NOTE Women"s size Small fits Youth shoe size 2-4.5)