All Darn Tough socks are made in Vermont, USA and through the years they have become experts in providing quality wool socks to be worn during activities such as running, biking, skiing, hiking and hunting. The US Army is perhaps their biggest customer, maybe because they are super comfortable to wear and made to last longer than you'd possibly expect when it comes to wool socks.

Darn Tough socks comes with an unconditional lifetime guarantee that states that "If our socks are not the most comfortable, durable and best fitting socks you have ever owned, return them for another pair for free."

Darn Tough uses only the finest Merino Wool sourced from farms that share their ethical values, and they only use sustainably sourced Merino Wool from sheep that are not exposed to the practice of mulesing. In addition they support the Responsible Wool Standard (RWS) that works to protect animal welfare, helps farmers follow sustainable land management practices and ensures traceability throughout the entire supply chain.

The Heavyweight Tactical socks is a pair of durable Merino Wool socks intended to worn in extreme cold weather! These socks are the warmest and heaviest ones made by Darn Tough, made with extra heavy terry loop construction making them incredibly thick and soft to wear while also making sure that your feet and calf will be well protected to endure extreme cold. 

EUR sizes:
XS / EUR 35 - 37.5
S / EUR 38 - 40.5
M / EUR 41 - 42.5
L / EUR 43 - 45.5
XL / EUR 46 - 49.5

- Darn Tough T433 / T4033 Boot Sock Heavyweight Tactical With Full Cushion Black
- Materials: 80% Merino Wool, 19% Nylon and 1% Lycra
- Made with extra heavy terry loop construction
- Made for extreme cold weather
- Naturally antimicrobial that repels bacteria and odor
- Made in Vermont, USA