Blue Flame E-Tech Bamboo Thermal Socks

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What Size Do You Need?

Blue Flame E-Tech thermals not only insulate but use the super moisture-wicking properties of bamboo viscose to keep feet drier. While moisture build-up typically defeats most socks' insulative properties, these E-Tech are designed with thick inner loops of cushioning that trap heat and keep your feet warm and dry for hours.  You can feel this sock working when you remove your foot from your footwear and you feel a wave of cool air created from rapid evaporation of moisture.  This sock rates four flames out of four for thermal properties.

  • Bamboo viscose looped thermal pile trap and hold heat.
  • The knitted smooth integrated toe seam stitching reduces friction.
  • Natural moisture-wicking materials help keep feet dry and blister-free.
  • Arch support for comfort to fight foot fatigue.


You Need Sock Size
6-10.5 5-9 M
10.5-14 9-12.5 L

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Sock Materials:

40% Bamboo Viscose / Acrylic / Polyester / Spandex

Why Bamboo Socks?

Bamboo is an ecologically friendly plant to farm. Unlike other materials, bamboo viscose performance attributes are natural, so there is no need for chemical additives or fabric conditioners. Bamboo viscose has a silk-like feel and is ultra-soft against your skin, which reduces friction and makes for really comfortable socks. Learn more...

Blue Flame Thermal Socks Warmth Index

Socks That Will Not Give You Blisters Lifetime Blister Free Guarantee! Learn more...

Socks You Are Guaranteed To Love 30-Day Money-Back Guarantee for Online Purchases. Learn more...

27 Reviews

  • 5
    Blue Flame Socks

    Posted by S Layton on Dec 20th 2023

    I bought a pair for an elderly neighbor who is always cold. He is very happy with them and said the socks fit well and are warm and well made. He also said they feel like compression socks, which he really likes.

  • 5
    Cozy and warm bamboo socks

    Posted by Sunshine on Jan 11th 2023

    These socks are warm and cozy, as well as kind to animals and the environment.

  • 5
    Blue Flame Socks

    Posted by Heather Bell on Nov 15th 2022

    Thermal socks usually make my skin itchy, but these are very soft and comfortable. I'm really glad I got them.

  • 5
    My husband loves these!

    Posted by Paula S. Ausserer on Apr 17th 2022

    These are my husband's favorite everyday socks. He ays they are comfortable like no other, warm yet breathable, and nice looking. They come out of the washer and dryer looking great. He hopes you continue the line and offer some of the colors again that sold out this season.

  • 5
    Blue Flame E-Tech Bamboo Thermal Socks

    Posted by Robin on Mar 1st 2022

    These socks are just about perfect. I have neuropathy in my feet making them very sensitive. These socks are wide enough across the toes to never bind or rub, even after many washings and are comfy and warm for winter and wet weather.

  • 4
    Blue Flame E-tech bamboo thermal socks

    Posted by PickyPlz on Jan 8th 2022

    Unfortunately these socks are too thick for me to wear them with my current work boots.

  • 5
    Super warm!

    Posted by Amanda Trosten-Bloom on Jan 3rd 2022

    We're great fans of your diabetic (non-binding) socks - and these are the best of all worlds. Super warm for my husband's cold, cold feet!

  • 5
    Bamboo socks are great

    Posted by Sunshine on Dec 16th 2021

    We haven't tested them in the dryer yet, we just hang them to dry, bit they don't shrink. They are warm. They are ecological. Kind to animals. I'm never going back to wool.

  • 5
    Great Winter Sock

    Posted by Karl on Aug 9th 2021

    The absolute best sock to keep your feet warm when outside in the cold.