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Merino Thermal OTC Sock by Simms: warm, durable and breathable Merino wool sock over the calf.

The Merino Thermal OTC Sock by Simms it is designed to offer superior thermal insulation and long-lasting comfort on the coldest days, thanks to the naturally breathable and anti-odor heavy Merino wool.

The Merino Thermal OTC Sock by Simms features reinforced arch support, a reinforced heel and toe for durability, and an above-calf height that’s ideal for use with waders and hiking boots. Fishing.