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Fabric: 100% Royal Alpaca Wool
Fabric Dye: Low Impact Dyes (GOTS)
Fabric Finishing: Silicone (OEKO-TEX)
Elastic: 50% Tree Rubber, 50% Cotton
Thread: 100% Pima Cotton
Thread Dye: Reactive Dye
Label: 100% Royal Alpaca Wool
Label Ink: Synthetic (GOTS)

Materials
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Fabric: 100% Royal Alpaca Wool
Fabric Dye: Low Impact Dyes (GOTS)
Fabric Finishing: Silicone (OEKO-TEX)
Elastic: 50% Tree Rubber, 50% Cotton
Thread: 100% Pima Cotton
Thread Dye: Reactive Dye
Label: 100% Royal Alpaca Wool
Label Ink: Synthetic (GOTS)

Materials

Men's Alpaca Wool Sweatpants

420 Midweight

Men's Alpaca Wool Sweatpants: 420 Midweight

¥36,495

Regular price

¥27,371

Regular price ¥36,495 Sale price ¥36,495
0% OFF

25% OFF

Low Impact Dyes:
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Men's Alpaca Wool Sweatpants: 420 Midweight

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Product weight (medium): 18 oz / 490 gr

Alpaca vs Merino

Alpaca Wool outperforms Merino.

Alpaca fibers evolved in the harsh Peruvian Andes over millennia, to keep you protected on any adventure.

Unique Semi-Hollow Fibers:
• Lighter Weight
• Higher Insulation

Smoothest Fiber Scales:
• Moisture Wicking
• Softer without Felting

High-Performance Fiber

Pack lighter, travel farther.

Get the most out of nature with the ultimate performance fiber. Explore the outdoors clean and dry, with naturally anti-bacterial and temperature regulating Alpaca Wool.

❊ Anti-bacterial & Odor-resistant
↻ High sweat-wicking
☁ High breathability
☀ UV - Protection
✓ Light & durable

Microplastic-Free World

We put a stop to plastic pollution.

It is our mission to make clothes that allow you to explore nature without contaminating it with microplastics.

This is the first step in making our entire catalog petroleum-free and biodegradable.

We use only biodegradable materials:
• 100% Royal Alpaca Wool Fabric
• 100% Cotton Threads
• 100% Cotton Labels

Shipping & Returns

Free Shipping for US orders over $150 that are purchased from our US warehouse.*

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Active Comfort Mens Alpaca Wool Sweatpants 420 Midweight color black
Adventure Mens Alpaca Wool Sweatpants 420 Midweight color black
All Activities Mens Alpaca Wool Sweatpants 420 Midweight color black
Any Activity Mens Alpaca Wool Sweatpants 420 Midweight color black
All Natural Mens Alpaca Wool Sweatpants 420 Midweight color black
Eco Friendly Mens Alpaca Wool Sweatpants 420 Midweight color gray
Ecological Mens Alpaca Wool Sweatpants 420 Midweight color gray
Fast Drying Mens Alpaca Wool Sweatpants 420 Midweight color gray
Functional Mens Alpaca Wool Sweatpants 420 Midweight color gray
High Performance Mens Alpaca Wool Sweatpants 420 Midweight color gray
Single Origin Mens Alpaca Wool Sweatpants 420 Midweight color navy blue
Sweat Wicking Mens Alpaca Wool Sweatpants 420 Midweight color navy blue
Temperature Regulate Mens Alpaca Wool Sweatpants 420 Midweight color navy blue
Thermal Wool Mens Alpaca Wool Sweatpants 420 Midweight color navy blue
Thermo Regulate Mens Alpaca Wool Sweatpants 420 Midweight color navy blue
Active Comfort Mens Alpaca Wool Sweatpants 420 Midweight color black
Adventure Mens Alpaca Wool Sweatpants 420 Midweight color black
All Activities Mens Alpaca Wool Sweatpants 420 Midweight color black
Any Activity Mens Alpaca Wool Sweatpants 420 Midweight color black
All Natural Mens Alpaca Wool Sweatpants 420 Midweight color black
Eco Friendly Mens Alpaca Wool Sweatpants 420 Midweight color gray
Ecological Mens Alpaca Wool Sweatpants 420 Midweight color gray
Fast Drying Mens Alpaca Wool Sweatpants 420 Midweight color gray
Functional Mens Alpaca Wool Sweatpants 420 Midweight color gray
High Performance Mens Alpaca Wool Sweatpants 420 Midweight color gray
Single Origin Mens Alpaca Wool Sweatpants 420 Midweight color navy blue
Sweat Wicking Mens Alpaca Wool Sweatpants 420 Midweight color navy blue
Temperature Regulate Mens Alpaca Wool Sweatpants 420 Midweight color navy blue
Thermal Wool Mens Alpaca Wool Sweatpants 420 Midweight color navy blue
Thermo Regulate Mens Alpaca Wool Sweatpants 420 Midweight color navy blue
mens sweatpants color black
mens sweatpants color gray
mens sweatpants color navy blue

Men's Alpaca Wool T-Shirt

110 Ultralight

¥36,495
🌱  Leave No Trace Apparel
Not in Stock? Email us

Alpaca vs Merino

Fabric Care

FREE SHIPPING* & Returns

LESS WEIGHT, LESS WASHING

The Best Winter Sweatpants

Our 100% Alpaca Wool Sweatpants are crafted for conquering the outdoors in the most extreme conditions. They are breathable, and will keep you warm, and comfortable whether you're winter hiking, snowshoeing, or skiing. Thermoregulating and high moisture-wicking bottom layers are a must-have for any winter adventure.

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mens all activities sweatpants midweight color gray

NATURAL HIGH-PERFORMANCE

The Best Fleece Sweatpants

For thousands of years, alpacas have been adapting to extreme environments of the Andes Mountains, where temperatures range widely. The harsh highland conditions created the ultimate outdoor fiber, designed to keep you protected, clean, and comfortable.

LEARN MORE ABOUT ALPACA PERFORMANCE

mens all activities sweatpants midweight color gray

ALPACA WOOL: FIBER OF THE GODS

The Superior Fiber for the Outdoors

Alpaca wool is a superior choice for the outdoors and outperforms any other fiber: merino wool, cotton, rayon and polyester.

THE COMPARISON: ALPACA VS OTHER FIBERS →

LOW ENVIRONMENTAL IMPACT

Eco-Friendly Sweatpants

When wearing 100% Alpaca Wool, you can rest assured that your clothes are not contaminating nature.

DISCOVER OUR SUSTAINABILITY

mens fast drying sweatpants midweight color natural gray

SINGLE ORIGIN SUPPLY CHAIN

Where Were These Sweatpants Made?

We use natural local resources and a short transparent supply chain. Our mission is to teach you as much as possible about how clothes should be made. Together we can move the fashion industry towards a sustainable future.

LEARN MORE ABOUT OUR SUPPLY CHAIN

Complete Your Hiking Pack

mens wind protection baselayer hoodie halfzip color black
mens thermo regulate baselayer hoodie halfzip color black
mens sweat wicking baselayer hoodie halfzip color black
mens moisture wicking baselayer hoodie halfzip color black
mens outdoor activities baselayer hoodie halfzip color black
mens natural baselayer hoodie halfzip color navy blue
mens low impact dye baselayer hoodie halfzip color navy blue
mens temperature regulate baselayer hoodie halfzip color navy blue
mens sustainable baselayer hoodie halfzip color navy blue
mens fast drying baselayer hoodie halfzip color navy blue
base layer hoodie color gray
base layer hoodie color natural blue
base layer hoodie color natural blue
base layer hoodie color natural blue
base layer hoodie color natural gray
base layer hoodie color natural red
base layer hoodie color natural white
base layer hoodie color natural white
mens wind protection baselayer hoodie halfzip color black
mens thermo regulate baselayer hoodie halfzip color black
mens sweat wicking baselayer hoodie halfzip color black
mens moisture wicking baselayer hoodie halfzip color black
mens outdoor activities baselayer hoodie halfzip color black
mens natural baselayer hoodie halfzip color navy blue
mens low impact dye baselayer hoodie halfzip color navy blue
mens temperature regulate baselayer hoodie halfzip color navy blue
mens sustainable baselayer hoodie halfzip color navy blue
mens fast drying baselayer hoodie halfzip color navy blue
base layer hoodie color gray
base layer hoodie color natural blue
base layer hoodie color natural blue
base layer hoodie color natural blue
base layer hoodie color natural gray
base layer hoodie color natural red
base layer hoodie color natural white
base layer hoodie color natural white
mens half zip hoodie color black
mens half zip hoodie color gray
mens half zip hoodie color navy blue

Men's Alpaca Wool Hoodie

230 Lightweight

from $145

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Men's Alpaca Wool Boxers

110 Ultralight

from $40

Customer Reviews

Based on 17 reviews
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A
Anonymous
Just as Advertised

Not the softest, but definitely the smoothest. I can comfortably wear these pants without underwear. I love how even the design is based in atavistic techniques, like not attaching drawstrings, buttons, elastics, or zippers; just a simple and much less fussy design. They are definitely warm, but relatively neutral feeling in hot weather. I do not like, however, that mine were shipped in plastic bags for some reason. I got mine in a bigger size to accommodate more room, but this does come at the risk of sagging if too many things are sitting in my pocket (not a negative, an observation).

Hi there! Thank you so much for your feedback! We’re glad to hear that you find the pants comfortable and appreciate the design.

We're sorry to hear about the bags—most of our packaging is made from compostable material, so it’s surprising to hear that yours arrived differently. We’ll look into this to ensure consistency in our packaging.

Thank you again for your observations and for sharing your experience. If you have any other questions or need further assistance, feel free to reach out!

f
feet banks
New favourite pants! Incredible

These alpaca sweatpants redefine comfort. soft, supple, but with a feeling of weight and strength. they breath when it is warm, they keep me warm when it is cold.
i can't take them off.
and i love that there are no plastics or chemicals.
best pants i own, by far.
feet

Thank you so much for your wonderful feedback! We're thrilled to hear that you're enjoying the alpaca sweatpants. It's fantastic to know that they provide the perfect balance of comfort, warmth, and breathability. The absence of plastics and chemicals is something we take great pride in, and we're delighted that you appreciate it. Enjoy your sweatpants, and thank you for sharing your experience!

B
Brett Stone
Amazing

Love the feel and fit of this well made piece of clothing. Super strechy and comfortable. Feel warm and breathable and well constructed.

It's great to know that you find it super comfortable, and well-constructed while providing warmth and breathability. If you ever need anything else, just let us know! :D

L
Louis P.
420

Great product- 420 midweight sweatpants

Thank you for your preference :D

N
Noel-Faith Manito
Perfect for a slim athletic fit.

Keeps me warm and is anti-stinky. I use it after my boxing workouts. And sometimes during. It can stay fresh and clean for a while. Well made and worth it.