Ending today, Sierra Trading Post offers the Brooks Unisex Every Day Double-Tab Socks 3-Pack in White/Black/Gray, White, or Breeze/Aurora/Storm for $5.99. Apply coupon code "ETJXR0317" to bag free shipping. That's a savings of $15 and the lowest total price we could find. They're available in sizes S to L, but not in all size/color combinations.