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Once you try them, you'll never go back! 10 recommended merino wool base layers (innerwear) that are even more comfortable

As the cold weather deepens, I miss merino wool again this year

Of course, we will do it again this year, just like last year

Wool has long been a staple in mountain wear, but after undergoing various improvements, it has gained many supporters as a magical undergarment that can be worn year-round. Merino wool base layers, a "new and old" material, eliminate the prickly feeling of traditional wool and offer a pleasant feel and exceptional comfort. Its moderate stretch allows for easy movement, keeps you warm even when you sweat, and even boasts natural odor resistance. Its high quality, covering all the essential winter underwear functions, makes it ideal not only for harsh outdoor environments, but also as everyday winter wear (underwear). Always comfortable, no need for layering or heating, it's becoming a winter necessity for many

This hybrid model is hot because it takes advantage of the functionality of merino wool while adding a unique twist

Looking at the new models released from last year to this year (2016), it seems that in recent years we are no longer competing on the quality of merino wool itself (has the competition in terms of quality already reached a plateau?), but rather we are entering an era of competition in technological innovation at various levels, from how the fibers are made to how the fabric is knitted

Of course, the advantages of 100% merino wool are still strong, but these hybrid models are all very challenging and attractive in the sense that they compensate for the weaknesses of merino wool without eliminating its strengths. And because it is underwear, it is not enough for it to just be excellent in functionality; there are many things that are required of a base layer, including delicate aspects of clothing such as comfort, fit, and design

This time, we will introduce 10 recommended items selected by our editorial team from the 2016 models, including many of these ambitious new models. These are important pieces of equipment that will completely change the comfort of your winter outdoors. Before you make a decision on impulse, please take a look at this list!

We also recommend this article on base layers

table of contents

Editor's Recommendations for Merino Wool Base Layers

Arc'teryx SATORO AR Zip Neck Shirt LS

Warmth ★★★ Comfort ★★★ Fit ★★★ Sweat management ★★☆ Everyday use ★☆☆

Arc'teryx's hybrid base layer this season features a newly developed material called "Nucliex STR," which combines merino wool fibers wrapped around a high-strength nylon core filament. This allows for the full utilization of merino wool's comfortable feel and warmth-retaining, odor-detergent properties, while simultaneously achieving the high durability of the nylon core. The thin, supple fabric feels truly exceptional, and the seams are minimized for a comfortable feel that rivals that of a 100% wool model. Furthermore, the stretchy polyurethane fibers ensure a perfect fit. This hybrid base layer maximizes the benefits of merino wool. (Crew neck version also available.)

SmartWool NTS Micro 150 Pattern Crew

Warmth ★★☆ Comfort ★★★ Fit ★★★ Sweat management ★★☆ Everyday use ★★★

If you were asked to choose a merino wool jacket that could be worn year-round, this would be the one to choose without a second thought. Made from 100% high-quality merino wool, it offers a fine, supple feel, excellent temperature regulation, flatlock seams to minimize unevenness, and strategically placed seams to avoid rubbing against the shoulders for a comfortable fit. Anyone who tries it on will appreciate the high quality, meticulous attention to detail. Its durability, which barely causes pilling or wear even after years of use, and its cost-effectiveness make it virtually impeccable. The most basic and versatile jacket is the lightweight 150g/m², but a thicker 250g/m² model is also available for the height of winter. *Zip-neck versions are also available

NORRONA Wool Round Neck

Warmth ★★☆ Comfort ★★★ Fit ★★★ Sweat management ★★☆ Everyday use ★☆☆

Among Scandinavian brands, Norrona is known for its uncompromising product design when it comes to functionality. The supple, soft feel of Norrona, achieved by densely weaving the finest ultra-fine wool fibers (17.5 microns), is a first since Smartwool (according to a US magazine, Smartwool is also 17.5 microns). While both brands offer undeniable comfort, this one is surprisingly bold, not sticking to 100% wool, but instead blending in 6% nylon to provide just the right amount of strength and compensate for the weakness of the ultra-fine fibers. Furthermore, the fabric's thickness of 170g/m2 is just right for fall and winter underwear—neither too thick nor too thin. The snug fit and comfortable fit make this the perfect choice for intense winter sports. Also available in a zip-neck version

Patagonia Capilene Air Crew

Warmth ★★☆ Comfort ★★★ Fit ★★★ Sweat management ★★★ Everyday use ★★★

Our proprietary fabric, "Capilene Air," is a revolutionary blend of ultra-fine merino wool sourced from Patagonia and Capilene (a synthetic fiber) seamlessly knitted using advanced spinning technology with zigzag grooves. This creates an ideal bulky structure, dramatically improving warmth per weight. The air-permeable grooves also improve breathability, making this an innovative base layer that's both warm and breathable. In addition to its functionality, the soft, seamless feel and highly stretchable fit ensure a snug, yet never restrictive, fit for unparalleled comfort. Experience unprecedented comfort. *Images taken from the manufacturer's website. A hooded model with even greater warmth is also available

Rab Merino Plus 160 Long-Sleeve Crew

Warmth ★★☆ Comfort ★★☆ Fit ★★★ Sweat management ★★★ Everyday use ★☆☆

This wool-synthetic blend model utilizes "37.5 Technology," which attaches highly porous, active carbon particles to the surface of polyester fibers. Sweat is quickly wicked away from the skin's surface through capillary action and surface tension, resulting in a dry, fast-drying garment. It maximizes comfort during exercise while leveraging the warmth of merino wool. Despite its slim fit, the garment's contoured cut and moderate stretch ensure superior freedom of movement. The seams are positioned to avoid interference with backpacks. Its superior sweat-wicking capabilities make it ideal for high-mobility activities, especially in cold weather, such as climbing, running, and backcountry skiing. Also available in a zip-neck version

Teton Bros. Power Wool Grid L/S

Warmth ★★★ Comfort ★★★ Fit ★★☆ Sweat management ★☆☆ Everyday use ★★★

This new mid-weight, crew-neck base layer features a hybrid merino wool and synthetic material called "Polartec Power Wool." Rather than blending the fibers, it features a two-layer structure: an inner merino wool layer that directly touches the skin and an outer synthetic layer. It combines the comfort, warmth, and odor-resistant properties of wool with the breathability and durability of synthetic fibers. The wool lining, in particular, is brushed with ultra-fine fibers measuring 15.5 microns, creating an air layer that easily creates an air gap. Despite its light weight, it delivers instant warmth. Furthermore, the brushed fabric's grid-like texture ensures excellent breathability and prevents stuffiness, creating a highly balanced and well-balanced garment. Other snow-specific features, such as a longer back hem, are a welcome addition for backcountry skiers

Icebreaker Oasis LS Crewe Stripe

Warmth ★★★ Comfort ★★★ Fit ★★☆ Sweat management ★★☆ Everyday use ★★★

Alongside Smartwool, Icebreaker is one of the top merino wool brands. Their classic series boasts a thickness of 200g/m², which is plenty thick for the fall and winter seasons, an incredibly smooth feel, and an exquisite fit that's perfect for both outdoor and everyday wear. I secretly believe that their line still ranks highly in terms of ease of use, even for everyday wear ( see this review for details ). What's great is the extensive lineup, with a wide variety of colors. This year, a thicker stripe pattern has been added to the striped model, in addition to last year's pattern. *Zip neck versions are also available.

Houdini Activist Crew

Warmth ★★☆ Comfort ★★★ Fit ★★☆ Sweat management ★☆☆ Everyday use ★★★

If you're looking for ultimate comfort, Houdini's merino wool is a must-have. Last year, we introduced the Airborn Crew, which is blended with silk, but this year's top pick is a model blended with Tencel, an eco-friendly material that is even softer, more durable, and quick-drying. Not only is the patterning excellent for its lightness, texture, and stress-free comfort, but its improved breathability makes it suitable for everyday use as well as intense winter sports like skiing and backcountry skiing. The unique texture and color of the fabric are also unique to this brand. *Zip-neck versions are also available

Ibex Woolies 1 Crew Stripe

Warmth ★★☆ Comfort ★★☆ Fit ★★★ Sweat management ★★☆ Everyday use ★★☆

IBEX, a merino wool apparel manufacturer, uses ultrafine, high-quality merino wool from New Zealand to expand the possibilities of merino wool in a variety of situations, from the harsh outdoors to everyday life. They offer a wide range of simple yet stylish silhouettes and designs that blend seamlessly into your everyday life. This classic model is made from 100% wool, but its stretchy raglan sleeves (form fit) provide an excellent fit. IBEX also offers a comfortable model called the Nelson Long Sleeve, made with 17.5 micron fibers, but its relatively loose fit (regular fit) makes it more suitable for everyday wear. For this reason, if you prioritize sportswear, this classic model is still recommended. Also available: a zip-neck version

Mont-bell Super Merino Wool LW Round Neck Shirt

Warmth ★☆☆ Comfort ★★☆ Fit ★★☆ Sweat management ★★☆ Everyday use ★☆☆

It offers a level of functionality that is beyond reproach, and is surprisingly affordable. Could there be any benefits more obvious than this? While it doesn't stand out in any particular way, it does have the characteristics of merino wool, such as flexibility, heat regulation, and odor resistance, so as I previously reviewed, it's more than enough... and if you're willing to use it as an inner layer (though I personally find the silhouette a bit disappointing), it's definitely a great deal. After using it for a year, I found it to be quite durable, so it's best to plan on replacing it every year. Also available in medium and extra-thick models, as well as a zip-neck version

summary

Merino wool has become firmly established as an outdoor base layer, but this year it continues to become easier to use with new mechanisms, making it an interesting field to keep an eye on. What's most appealing about it is that, unlike other mountain gear, it's also useful in everyday life, which is a real pain, and every time a new model comes out I can't help but buy it just to try it out. Anyway, if you haven't tried merino wool yet, which has become an essential piece of winter gear, why not take this opportunity to give it a try?

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