The ultimate sock for high altitude expedition use. Designed for hard shell mountaineering footwear and extended cold weather activities in extreme environments. Hand sewn and designed with specific left and right foot anatomical shapes for precise fit. This is the cutting edge of warmth technology!

Based on feedback we received from professional mountaineers and cold-weather athletes we learned that most wool socks on the market were too constrictive and maintained moisture during their activities. This can be dangerous in parts of the world where a wet foot can lead to hypothermia or other serious conditions. 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 Yarn.

Two Layers of Polartec Power Stretch on the outer layer of the sock provide warmth without increasing weight. The smooth outer layer is wind- and abrasion-resistant; the soft inner layer pulls moisture away from your skin keeping you dry, warm and comfortable.

The inner layer of Primaloft Yarn is made up of ultra-fine polyester fibres which are finer than cashmere, resulting in a luxuriously soft feel while providing unparalleled moisture wicking. When hiking, climbing or doing any aerobic activity, your body works up a sweat and emits heat and perspiration, but when you suddenly sit idle, you can easily start to freeze with an insulation that absorbs water. Primaloft fibres wick moisture away from the skin and trap body heat.

Tested above 8,000 meters by athletes in real world conditions, you won't find anything else like these.

Features

• Height: Over Calf
• Cushioning: Super Heavy
• Heavily insulated and designed for high altitude climbing
• Performs like a traditional sock (Stays up on your foot, fits snuggly)
• Left Foot/Right Foot anatomical design for a precision fit that ensures better blood and nerve flow and unrestricted movement
• Hand sewn in Spain to maintain the highest quality in every pair
• Polartec Power Stretch provides elasticity, support, and warmth
• Primaloft Yarn insulation is soft against the foot while working to trap body heat and wick moisture away from the foot

Primaloft

A polyester developed by Primaloft® (the worlds best artificial thermal insulator in technical garments). It creates a soft fibre, thermal insulation, hydrophobic that expels and doesn't absorb moisture.

Polartec® Power Stretch®

Polartec® Power Stretch® fabrics feature body-hugging 4-way stretch and are very breathable. They keep you dry when you sweat and provide warmth without weight. These are the most versatile outdoor and fitness apparel fabrics available today. Many of the fabrics feature a proprietary construction with two unique surfaces: the durable nylon outer layer is wind- and abrasion-resistant; the soft inner layer pulls moisture away from your skin keeping you dry, warm and comfortable.

T3+ Polartec and Mountaineering Class

The ultimate sock for the true expedition experience, designed for hard shell mountaineering footwear and extended cold weather. Two layers of Polartec® Power Stretch fabric sandwiching Primaloft® Footwear Insulation in a left and right foot anatomical shape puts these socks on the cutting edge of warmth technology.

T3+ socks represent the most advanced technology we've created. These are designed for extreme weather conditions where moisture and warmth management can mean the difference between life and death. These socks were developed by Lorpen through years of research and testing above 8,000 meters. Lorpen adventurers have used these socks to climb some of the highest mountains in the world where warm feet can mean the difference between a successful ascent or turning back. T3+ socks are hand knit and have an anatomically correct shape for left vs. right feet. These socks are for those who never want to worry about cold feet again.