Buy 2, Get 2 Free on our Ultimate Bison Wool Sock: 4 pairs for $88, or $22 a pair. Four gifts, done early. Our warmest sock for everyone on the list. Pick a color and size for each pair (Navy, Natural or Red; S/M or M/L) and all four ship free. "I've bought multiple pairs of these socks, a pair for each family member." Leighann B. They're knit in the USA, and four pairs take four pounds of trash out of waterways. Through Sunday, Oct 18. Build your 4-pack: link in bio. #unitedbyblue #bisonsocks #woolsocks #giftideas #stockingstuffers