The warmest sock.
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•The warmest sock ever! New & improved - 50% more stretch!
•Windproof/waterproof Breathable
•Four-way super stretch comfort
•Breathable Macro-porous Neoprene technology for drier warmth
•Seals in the heat
•Outlasts ordinary socks 3 to 1

The warmest insulation for:

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Browse 2 questions Browse 2 questions and 2 answers
What shoe size is extra large?
A shopper on Dec 29, 2017
BEST ANSWER: You can see all the sizing guides for all products on this page here:

Sock sizing will be at the bottom.

The Seirus Team
Wear directly on skin or layer over regular socks?
A shopper on Dec 27, 2017
BEST ANSWER: This sock is designed to be able to wear it alone but you could always layer it over normal socks for added warmth!