Completely looped, the Grandes Jorasses are your top choice for facing extreme temperatures. This sock is favored by those accustomed to severe cold, venturing into polar, Arctic, and Antarctic regions.A "medium" construction among our thickest socks, for maximum warmthNon-compressive tightness to keep this sock on your leg and protect you from chafing and blisters over time.As we mentioned, this sock is 100% looped, so be sure to allow enough room in your shoes for your comfort.