Why Merino
Wool Apparel?


We believe that adventures come in layers.

That you can enjoy everything from summiting new mountains to sipping a beverage at the base.

Merino wool layering Smartwool
Merino lifestyle Smartwool

All it takes is the right gear.

Merino wool is pretty magical. This sustainable, natural performance fiber helps fuel adventures in more ways than we could have imagined when we started making socks over 20 years ago.

After figuring out that it was so beneficial in socks, we started making Merino wool apparel designed to enable everything from backcountry skiing to multi-week treks to high-intensity training. We think that Merino wool clothing is key to staying comfortable in the outdoors.

Wool apparel layer
Wool apparel layer

Layers Matter

We design from the inside out.

That means we put Merino where it matters—next to skin. We also focus on using low-profile, non-chafing, strategically placed seams to maximize comfort. And we dial in our fits for end-use performance and comfort. This helps us create performance Merino wool apparel that is just as comfortable as it is efficient. And it helps you stay focused for every lap, summit, and powder turn.

1st Layer


Performance Evolved

Intraknit™ apparel is the absolute pinnacle of comfort and performance. We’ve taken 25 years of knitting expertise and combined it with brand new technologies and processes to create 3D-knit garments. These products use integrated gender-specific ventilation and insulation zones to keep body temperature stable while allowing full range of movement with durable fibers and articulated flex zones. The 3D-knitting process helps sculpt them to the human body, allows them to maximize warmth without adding bulk, and enhances breathability without sacrificing comfort.

first layer merino Smartwool

Merino 250

Start with a great base.

This is our core base layer fabric. The Merino 250 is the #1 base layer on the market, thanks to its warmth, softness, and fit. This collection of base layers and Merino wool apparel is ideal for cold-weather activities where warmth and breathability are crucial. Its 100% Merino wool construction moves moisture away from the skin while it’s still in a vapor state, helping to keep you warm, dry, and stink-free all day long.

Slim Fit

form-fitting for maximum Merino contact

Regular Fit

leaves extra room for additional movement

Sustainable Wool

sourced through ZQ-certified farms

first layer merino Smartwool

Merino 150

Your Layer for Everything

This lightweight collection of Merino wool clothing is perfect for four-season layering and everyday comfort. Available in a variety of fits and designs, it offers maximum versatility. From our comfortable underwear to our stylish, lightweight hoodies and beyond, it transcends seasonality to create a layer that can be worn in warmer months or combined with other layers in colder months.

Slim Fit

form-fitting for maximum Merino contact

Core Spun Technology

Our Core Spun Merino wool technology beefs up garment durability without sacrificing next-to-skin comfort by wrapping high-quality, super-soft Merino around a nylon core for every thread in our 150 fabric.

Sustainable Wool

sourced through ZQ-certified farms

first layer merino Smartwool

Merino Sport Apparel

Merino That Moves

Merino Sport apparel is our most performance-driven collection of clothing. It combines ultra-soft Merino wool, lightweight polyester fiber blends, body-mapped vents, and reflective elements to enhance sweat management, dry times, durability, and visibility. It’s the best of both worlds.

2nd Layer
Second layer smartwool


A jacket that performs as intensely as you do

This midlayer is made for cold-weather adventures that call for high-performing insulation and easy movement. Smartloft-X combines comfortable Merino wool with a DWR coating that helps shed rain and snow to create a jacket that can handle the worst weather.

Second layer smartwool


Technical, comfortable, breathable insulation

We blend 50% recycled Merino wool, 38% virgin wool, and 12% polyester to create high-quality performance insulation that we use in all of our Smartloft products. When worn with our Merino base layers, it creates an efficient sweat transportation system that will help you stay comfortable as you enjoy your cold-weather adventures. The result is layers you don’t have to shed.

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Our lightest insulation

perfect for cool-weather performance

Midweight insulation

good for layering and high-output activities.

Warmer insulation

great for cool- to cold-weather days.

Our warmest insulation

ideal for cold-weather layering.

Second layer sportfleece smartwool

Merino Sport Fleece

Versatile. Durable. Comfortable.

The Merino Sport Fleece is where a casual look meets ultimate comfort. This collection uses stretch fabric for mobility and an outer synthetic for durability, while non-PFC DWR provides eco-conscious weather protection. You can wear this fleece from a hike to a happy hour with confidence.

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Second layer recycled smartwool

Recycled Fleeces

Cozy. Refined. Recycled.

Our Recycled Fleece uses reclaimed wool that has been collected, shredded, and re-spun to create a more sustainable wool product that you can feel good about wearing on the trail, in the office, and anywhere else your adventures might take you.

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Merino Sweaters

Created for warmth and comfort in cool to cold weather, our sweaters combine the breathability, temperature regulation, and odor control advantages of Merino with everyday layering. They’re styled to be classic and follow seasonal trends while always offering all-day comfort.

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