DISCLAIMER: Cyber Monday Free Koozie promotion is valid through December 3rd, 3am EST or while supplies last. Offer is not applicable to previously made purchases. Only one offer or discount code may be applied to a single order. We reserve the right to cancel any order due to an unauthorized, altered, or ineligible use of offer and to modify or cancel this promotion due to system errors or unforeseen problems. Free standard domestic shipping is valid on orders of two pairs of socks or more shipped to a single Contiguous U.S address. Shipping discount automatically applied at checkout. Offer is valid only on DarnTough.com.