Rachel and Leslie: I find this on the SS website when I log into"My Cruise"
Additional Items Needed for Polar Voyages
Insulated parka/ski jacket, down or synthetic — able to accommodate your sweater/jumper underneath. For guests sailing aboard Arctic, Antarctic and Chilean Fjords expedition cruises, please be sure to select the size for your complimentary parka at Silversea’s Expedition Gear Shop.
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Waterproof, knee-high, rubber boots (wellies) with non-slip soles.
I have Wellies from my Antarctica trip so I guess I will bring them along.
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Helen