Work Socks UphillSport Posio 3-Layer Merino Wool Work Socks Side Chocolate
Work Socks UphillSport Posio 3-Layer Merino Wool Work Socks Front Chocolate
Work Socks UphillSport Posio 3-Layer Merino Wool Work Socks Side Wine
Work Socks UphillSport Posio 3-Layer Merino Wool Work Socks Front Wine
Work Socks UphillSport Posio 3-Layer Merino Wool Work Socks Side Sky Blue
Work Socks UphillSport Posio 3-Layer Merino Wool Work Socks Front Sky Blue
Work Socks UphillSport Posio 3-Layer Merino Wool Work Socks Side Maroon
Work Socks UphillSport Posio 3-Layer Merino Wool Work Socks Front Maroon

Socks I Posio Trekking Socks I UphillSport

Regular price$26.08
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  • iDEAL Wero
  • Ideal for trekking
  • Finnish army multipurpose sock - Over 1 million pairs sold
  • 3- Layer structure - Keeps feet warm and dry
  • Thin structure - Still warm and durable
  • Elastic sport shaft - Stays up
  • Grip on arch - Better fitting
  • 48 % Merino wool, NATIVA, 31 % Polyamide, 20 % Polypropylene
  • Thermal rating 4 out of five
  • Thickness light 1 out of three

Socks I Trekking Socks 3-Layer Duratech L4 With Merino 

Crew socks designed for tough work conditions for people seeking comfort and durability. Made with a unique 3-layer Duratech structure and 48% Merino wool, they keep feet warm and dry in all conditions. The seamless toe construction prevents chafing, while the elastic sport shaft ensures your socks stay up during long hours on your feet. 

  • Proven in the Finnish army with more than a million pairs sold
  • Unique triple-layer system delivers outstanding moisture management, durability, and long-lasting comfort
  • Elastic sport shaft - stays up
  • Grip on arch - Better fitting
  • Seamless Toe Design: Eliminates chafing and hotspots, providing pain-free comfort throughout long workdays
  • Lightweight Yet Warm: Thin profile with thermal rating 4 offers excellent insulation, making these socks ideal for both summer and winter use

Key Benefits

Reinforced durability but lightweight and warm for heavy-duty use
Regulated temperature and breathability for optimal comfort
Antimicrobial properties to resist odour build-up
Moisture-wicking technology to keep feet dry all day
Melbourne based for for quick and easy delivery in Australia

Material Composition

  • 48% Merino wool NATIVA
  • 31% Polyamide
  • 20% Polypropylene
  • 1% Elastane

Pair weight 55 grams


    • Wool is a warm and breathable material.
    • Sheep wool has excellent performance characteristics, as it breathes and insulates heat well.
    • Self-renewing and biodegradable, natural fibre absorbs moisture well, does not wrinkle and straightens quickly.
    • For wool products, airing rather than washing is sometimes sufficient.
    • Wool is naturally fire-retardant, highly resistant to bacteria and mould.

    UphillSport® is an outdoor lifestyle brand originating from Finland, renowned for its high-performance socks specifically engineered for extreme outdoor conditions. Rooted in the Tampere region—an area with over 200 years of rich textile manufacturing heritage—UphillSport benefits from unparalleled craftsmanship and innovation in textile production.

    The brand is created and produced by Sukkamestarit Ltd, a Finnish company with a long-standing history in sock manufacturing since 1996. Leveraging decades of expertise, Sukkamestarit has honed advanced techniques to produce premium performance socks capable of withstanding the harsh, cold, and moist sub-Arctic climates typical of northern Finland.

    Launched in 2014, the UphillSport® brand combines traditional textile heritage with cutting-edge technology, focusing on multi-layer sock systems that maximize breathability, moisture management, durability, and warmth. Each pair of UphillSport socks undergoes rigorous Arctic testing to ensure reliability in extreme weather conditions, making them a trusted choice for outdoor enthusiasts, athletes, and professionals alike.

    UphillSport's product range includes specialized socks for hiking, running, skiing, fishing, and workwear, designed to provide unparalleled comfort and protection on any adventure—from Arctic expeditions to rugged Australian treks. The brand’s commitment to innovation and quality is further exemplified by its military-grade performance credentials, such as being worn during the Netherlands Marine Corps’ world record speed march under freezing temperatures.

    Today, UphillSport stands as a premium sock brand that seamlessly blends Finnish tradition with modern technological innovation, dedicated to delivering durable, multi-layered socks that keep feet dry, warm, and supported no matter the challenge.

    UphillSport® has revolutionized outdoor and performance socks through their pioneering Multi-layer System technology. At the heart of their innovation is a carefully engineered technical multilayer structure that allows the creation of socks that are remarkably warm while maintaining a slim and lightweight profile. Unlike traditional thick socks that rely solely on bulk to provide insulation, UphillSport® leverages the unique properties of different materials layered strategically to optimize performance.

    Each layer in the Multi-layer System serves a specific function — from enhancing breathability and managing moisture, to increasing durability and delivering superior warmth in harsh conditions. This approach ensures that UphillSport® socks effectively regulate temperature and keep feet dry, even during intense physical activities or in extreme outdoor environments.

    Ideal for active outdoor enthusiasts and performance athletes alike, these socks provide comfort and protection without compromising mobility or fit. Whether hiking, skiing, or engaged in tactical work, UphillSport® socks offer the technical advantages needed for high-performance demands.

    Committed to continuous innovation, UphillSport® combines advanced manufacturing expertise with sustainable practices, ensuring their products are not only technically advanced but also environmentally responsible. This dedication to quality and sustainability solidifies UphillSport® as a leader in the development of next-generation outdoor performance socks.

    Care instructions:

    • pre-wash merino wool socks before use
    • for merino socks, airing alone is often sufficient
    • careful washing at a maximum temperature of 40 degrees Celsius
    • use as light a spin as possible
    • the use of a wash bag saves wear and tear
    • do not use detergents containing rinsing agents or bleaching agents
    • do not use a tumble dryer or drying programmes
    • please note that merino wool socks will shrink in the wash, please shape/stretch the socks while damp to restore the original size
    • use a lint remover - merino wool socks are easily linted by rubbing

    Pairs well with

    UphillSport Work and Tactical Socks

    The Secret Layer No Outdoor Pro Leaves Home Without

    Don’t let your gear fall short. UphillSport’s patented four-layer Merino Wool socks provide military-grade protection and unmatched comfort. The secret layer keeping Aussie outdoor pros going strong—are you in?

    Buy Now

    Imagine Socks That Work as Hard as You Do

    Put your feet in socks designed for relentless work. Finnscott Merino Wool hiking socks deliver unbeatable toughness and comfort for farmers, miners, and outdoor warriors who never quit.

    Farmers, Miners & Soldiers Agree: Socks Matter More Than You Think

    What separates a good day from a great one on the job? The right socks. UphillSport’s Merino Wool work and tactical socks are engineered for rugged professionals — combining durability, warmth, and comfort for unbeatable outdoor performance.

    Military Approved and tested

    How Adventurers Are Breaking Records With These Socks Built for -50°C

    Dutch Marine Corps ran the World Record in speedmarch 2020 with UphillSport socks and backpack of 18.1kg, in a time of 03:59.

    High Performance Technical Socks

    Unique Multi-layer Structiure

    UphillSport patented multi-layer structure specifically designed for sub Arctic conditions. Made in Finland and designed to perform in extreme cold conditions. Military tested and with more than one million pairs sold to the Finnish and Danish military. Buy with confidence.

    Got Questions? We've Got You.

    Yes, UphillSport has proudly received the prestigious Scandinavian Innovation Award for its groundbreaking Repo sock. Designed with cutting-edge technology and crafted from high-quality merino wool, the Repo sock sets a new standard in comfort, durability, and performance. Engineered to excel in even the most demanding environments, it combines superior moisture management, temperature regulation, and ergonomic fit to keep your feet comfortable all day long. This accolade recognizes UphillSport’s commitment to innovation and excellence, solidifying the Repo sock as a top choice for athletes, outdoor enthusiasts, and professionals alike.

    Yes, our socks have been rigorously military tested and proudly selected above many competitors. UphillSport won tenders to supply socks to the Danish and Finnish militaries as well as the Belgian Marines. Our selection was the result of comprehensive laboratory and demanding field tests, proving the superior quality, unparalleled durability, and advanced technical design of our Merino wool socks—specifically engineered to meet the toughest military standards. Designed for comfort, performance, and resilience in extreme conditions, our socks have earned the trust of armed forces around the world. To date, we have supplied over one million pairs to military personnel, a true testament to their reliability when it matters most.

    1. ANIMAL WELLFARE
    • Behaviour, animal handling and health, feeding, sheep breeding
    • NATIVA Protocol educates and help farms for better wellfare
    MULESING METHOD IS PROHIBITED
    2. SAVE WATER
    • Wool processing uses only rain water, after the process water is cleaned and 90% is
    released back to nature circulation
    • Biodegradable washing process
    • Chlorine free process for wool superwash
    3. COMMITMENT TO WHOLE SUPPLY CHAIN
    • Long term supplier relationships. Orders for suppliers from 6-24 months for stable
    demand of raw materials. Transparency helps with investments and planning
    • Care of Suppliers employees as our own
    4. COMMITMENT TO CUSTOMERS
    • Collection in stock service minimizes over purchasing. Continues collections avoid end of
    lines
    • Durability saves raw material, energy, environment and prevent risks
    • Together with our farms and NATIVATM we can commit to availability for the merino wool

    Unfortunately, socks made entirely from pure wool tend to have a limited lifespan due to wool’s natural properties. While wool is prized for its warmth, softness, and moisture-wicking abilities, it inherently lacks strong abrasion and wear resistance. This means that when subjected to the constant friction and pressure experienced during daily wear, pure wool socks can quickly become worn out, develop holes, or lose their shape.

    Given the heavy wear and tear socks endure, manufacturers often blend wool with synthetic fibers to enhance durability without sacrificing the natural benefits of wool. One commonly used synthetic fiber is polyamide (also known as nylon), which provides excellent strength, elasticity, and resistance to abrasion. By incorporating polyamide into the fabric, socks become more resilient and retain their form and performance over extended periods.

    In fact, the wool we use for our socks is already blended with 20% polyamide. This deliberate combination improves the durability of the wool yarn, ensuring that the socks maintain their softness and comfort while significantly extending their wear life. As a result, our wool-polyamide blend offers the perfect balance of natural warmth and toughness, making the socks both comfortable and long-lasting.

    It is difficult to determine the lifespan of a sock, as it depends on many individual factors such as the intended use, the sock materials and its structure. For example, the lifespan of alpaca wool socks in everyday use is very short, as alpaca wool is not very resistant to abrasion and wear. Therefore, it is best suited for use as sleeping and lounge socks. On the other hand, socks with more synthetic fibres or, for example, a multi-layered structure bottom can last for years.

    Still, it is not possible to draw any precise line as to which material will last a certain amount of time for each person and which will not. For example, the shoes worn with the socks,
    the roughness of the soles of the feet, the fit of the sock and the surfaces on which the socks are walked on also contribute to the durability and lifespan of the sock. You can learn more about the materials in our online store's material information. We have also tried to describe the product's features and structures as accurately and as comprehensively as possible on our product pages.

    The frequency with which socks need to be washed is highly individual and varies depending on several factors. One of the primary influences is the type of footwear worn; for example, closed shoes that restrict airflow may cause feet to sweat more, necessitating more frequent washing. Additionally, the natural tendency of a person’s feet to sweat plays a significant role. Individuals with higher levels of perspiration will generally need to wash their socks more often to maintain hygiene and comfort.

    The material of the socks is another important consideration. Socks made from breathable, moisture-wicking fibers tend to stay fresher for longer periods. For instance, merino wool socks possess natural antimicrobial properties and excellent moisture management, which means they do not need to be washed after every use. Simply airing them out between wears is often sufficient to keep them fresh and odor-free. In contrast, synthetic or cotton socks may require more frequent washing, as they can retain moisture and odors more readily.

    Ultimately, the decision on how often to wash socks should be guided by individual comfort, activity level, and the specific characteristics of both the footwear and sock materials.

    Sock sizes measured “relaxed” can vary significantly, even among socks labeled the same size. Factors such as material composition, construction, and elasticity all influence these variations. However, socks of the same size generally have the same stretch capacity, meaning they will extend to the same size when worn, despite differing measurements when unstretched.

    Therefore, there is usually no need to worry about size differences. But if a sock feels completely wrong on your foot, it's a good idea to check the inside of the sock leg to confirm that the knitted size matches the label.

    Additionally, we recommend washing our wool-based and ski socks at least once before use. This initial wash helps the socks adjust to their proper size and shape, ensuring optimal fit and comfort.

    NATIVA WOOL

    NATIVA Certified Farms

    Our wool is sourced from farms committed to ethical practices. It’s mulesing-free, ensuring cruelty-free comfort. Experience Merino wool—the natural, sustainable choice for your next adventure.