Winner of the 1997 Backpacker Magazine's Great Sock Test. When you need extra insulation against the elements, good shock absorption and support under heavy loads this is the sock for you. Heavy cushioning throughout this sock provides extra comfort, insulation and protection, making it perfect for hardcore hiking, long treks and heavy-laden backpacking. Elasticized ankle brace holds heel in place and allows for less bulk and greater forward flex in the boot. High Density Footbed (HDF) for improved performance, comfort and durability. Crew height. QCActive.com (Active Endeavors) is your online source for Smartwool and Smartwool Hiking Socks. Smartwool Trekking Heavy Crew Winner of the 1997 Backpacker Magazine s Great Sock Test When you need extra insulation against the elements good shock absorption and support under heavy loads this is the sock for you Heavy cushioning throughout this sock provides extra comfort insulation and protection making it perfect for hardcore hiking long treks and heavy laden backpacking Elasticized ankle brace holds heel in place and allows for less bulk and greater forward flex in the boot High Density Footbed HDF for improved performance comfort and durability Crew height Smartwool,Smartwool Hiking Socks,QCActive,Active Endeavors