At Lorpen we work with great ambition and skill to tackle the unknown, thus developing exclusive fibers and technologies, such as T3 and SLS. To do this, we use the most advanced sock manufacturing techniques, as well as the feedback and experience of professional athletes to improve ourselves in each new generation of socks. What’s more, we sponsor all kinds of outdoor sports enthusiasts to test our socks in real conditions.

The feed back and comments provided by these athletes allow us to fine-tune the fibers and technologies used in the sock, thus ensuring that the feet remain warm and dry. In addition, our socks have been tested by elite athletes such as Alberto Iñurrategi (Alpinist), Jokin Lizeaga (Trail Runner) and Gerlinde Kaltenbrunner (Alpinist), in the most extreme situations. These are just a few examples of athletes who have trusted Lorpen quality for years.

Alberto Iñurrategi and Gerlinde Kaltenbrunner recommend:


The T3+ Inferno Expedition Polartec® is the ultimate sock for high altitude expedition use. Designed for hard shell mountaineering footwear and extended cold weather activities in extreme environments, the T3+ Inferno Expedition Polartec® has been sewn and designed with specific left and right foot anatomical shapes for precise fit.

Based on feedback we received from professional mountaineers, we learned that most wool socks on the market were too constrictive. This can be dangerous in parts of the world where a wet foot can lead to hypothermia. Our design team wanted to solve this problem by creating a sock that would be incredible warm and dry. We searched the globe to find materials and a construction process that provide the perfect combination of elasticity, support, and warmth. We found that perfect combination in POLARTEC® POWER STRETCH and PRIMALOFT®.

Tested above 8,000 meters by athletes in real world conditions, the T3+ Inferno Expedition Polartec® is the ultimate sock for high altitude expedition use. This sock has been designed for hard shell mountaineering footwear and extended cold weather activities in extreme environments.

Jokin Lizeaga recommends:


Maximum T3 performance now combined with SLS technology and adapted to the characteristics of the male foot. As a result, we obtain a very hard-wearing sock, with cushioning in the sole that keeps your foot free of blisters during your days of trail running. The T3 Men’s Trail Running Padded sock features separate layers of fibers that work together for comfort, support, and moisture management.

COOLMAX® is a polyester yarn from Invista® with channels to efficiently transport moisture away from the skin to the outside of the sock. COOLMAX® fibres work to move perspiration away from the body, and through the fabric, where it can evaporate quickly, allowing the wearer to feel cooler and more comfortable.

TENCEL® is a cellulose Lenzing fiber which comes from Eucalyptus plants on certified sustainable plantations. Tencel®’s nano-structure provides exceptional wicking, accumulation, expansion and drying of moisture. TENCEL® provides a layer that is soft to the touch and comfortable against the skin. It is a fully biodegradable fiber that is made from trees from sustainable farms.

Lastly, a layer of STRETCH NYLON with LYCRA® adds durability and ensure these socks stay up in your running shoes without slipping down to your toes. This combination of fibres make the T3 Men’s Trail Running Padded sock perfect for running in any season. Your feet will stay dry and comfortable all day, regardless of weather and time.