Looking for a family-friendly holiday break activity? Visit The Marine Mammal Center's hospital and visitor center in Sausalito, California! Tickets are free but must be reserved online in advance. For important health and safety policies and to reserve your tickets, see MarineMammalCenter.org/visit. Please note that we are CLOSED on Thanksgiving, Christmas, and New Year's Day.

Gray mid-calf socks with 9 sea lion profiles in white, gray, black, brown, and tan.

Decade Design Socks

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Our one-of-a-kind Decade Design, initially created in honor of The Marine Mammal Center’s 10th anniversary, remains our most popular design over 30 years later.


  • Made in the USA.
  • Crew length (mid-calf), gray.
  • Adult sock size 9-11, (approximate shoe sizes: men’s 6-8.5/women’s 8-10.5)