The Conquer is our lightest weight sock. Terry loop construction for a cushioned sole and 4 inches on the upper section to protect the shin from rubbing against the boot. Reinforced heel and toe with arch support. Silver infused alpaca for odor free wear. Alpaca fiber is naturally flame resistant and the yarn construction of the Conquer sock makes it a Class 1 flame resistant sock. Dedicated to those in military, search and rescue and forest service. For maximum confidence in extreme conditions, the Conquer sock is your choice. Proudly made in the USA.