Frequently Asked Questions
Everything you need to know about the world's most durable socks.
What does the 'Unconditional Lifetime Guarantee' actually cover?
Our guarantee is simple: if our socks aren't the longest-lasting socks you've ever owned, you can return them for another pair. No strings, no conditions, for life.
How do I process a warranty claim for a worn-out pair?
To start a claim, visit our Warranty page, fill out the form, and mail your laundered socks back to our Vermont headquarters. We will issue you a credit for a replacement pair.
What materials are used in Darn Tough socks?
We primarily use premium Merino Wool for its natural breathability and moisture-wicking properties, reinforced with Nylon and Lycra Spandex for durability and a perfect fit.
How should I wash and care for my socks?
For longevity, machine wash your socks in warm water on a gentle cycle with the socks inside out. Tumble dry on low or air dry. Do not use bleach or fabric softeners.
How long does shipping take within the United States?
Standard shipping typically takes 3-7 business days. We also offer expedited shipping options at checkout if you need your gear sooner.
How do I find the right size?
We provide a comprehensive size chart on every product page that converts your standard shoe size to our sock sizing (S-XXL) to ensure a high-density, performance fit.