Nilit Heat and the fibers that harness body heat

Coffee charcoal nylon that captures your heat and returns it to you as infrared. How it works and what to expect.

Merino Wool vs. Synthetic Fiber in the Cold: Which to Choose

Merino regulates and insulates when wet; synthetics are durable and dry quickly. That's why the answer is often to blend them.

What is copper thread used for in a cycling sock?

It's not marketing: copper is antimicrobial and reduces odor-causing bacteria.