Men's Alpaca Wool Boxer Briefs

160 Ultralight

$41.60 $52.00 20% OFF
3.9Rated 3.9 out of 5 50 reviews

Long days start with your first layer. These men's boxer briefs use breathable, 160 g/m² Alpaca wool fabric in a fitted cut that sits close beneath your everyday or hiking clothes.

Low Impact Dyes

Black

Natural Dyes

Why Natural?
Size: SSize guide

Free US shipping on orders over $200.

Final sale for hygiene reasons. This intimate apparel can't be returned or refunded. Defective-item claims are handled separately under our warranty.

Start with a lighter first layer.

Your layer starts with Alpaca wool from Peru. Its smooth fiber surface gives the knit a soft feel, while the knit structure allows air to move through as you do.

Product info

  • A close fit under your kit

    The fitted cut keeps the layer close to your body beneath hiking pants or everyday clothes.

  • Breathable on the move

    The light knit lets air move through, giving you a comfortable layer as you go from everyday miles to a change of pace.

Perfect for

  • Everyday wear
  • Hiking
  • Travel

Not for

  • Designed as next-to-skin underwear.

Product details

What goes into your layer
  • Fabric100% Alpaca wool
  • Thread100% cotton
  • Labels100% organic cotton
  • DyesNatural or OEKO-TEX certified, depending on the color. Undyed colors have no added dye.
  • Label inkGOTS certified

Specifications

  • Fabric weight160 g/m²
  • Weight62 g / 2.2 oz in size M
  • ConstructionFitted boxer briefs with natural stretch
  • FitFitted cut with natural stretch
  • Made inPeru
Size & fit

Use your body measurements to choose your size. These are body ranges, not flat garment measurements.

SizeWaistHips
S28 - 31 in33 - 35 in
M31 - 34 in35 - 38 in
L34 - 36.5 in38 - 40.5 in
XL36.5 - 39.5 in40.5 - 43 in
XXL39.5 - 42 in43 - 46 in
SizeWaistHips
S72 - 79 cm84 - 89 cm
M79 - 86 cm89 - 96 cm
L86 - 93 cm96 - 103 cm
XL93 - 100 cm103 - 110 cm
XXL100 - 107 cm110 - 117 cm
Care for your layer

Hand wash or machine wash on a gentle/wool cycle in cold water (50-68°F). Use a mild wool-safe or pH-neutral detergent. Wash with similar colors. Don't bleach or use fabric softener.

Reshape while damp and lay flat to dry. Don't tumble dry, twist, or wring. Cool iron if needed. Store folded in a cool, dry space with airflow; avoid hanging.

Naturally dyed colors can transfer with sweat or friction. Wear them with dark clothing or equipment, wash sparingly, and avoid citric acid, which can lighten the color.

Shipping & Returns

US orders over $200 ship free. Estimated US delivery is 7 to 10 business days, including preparation and transit. You'll receive a tracking number by email once your order ships. International rates are calculated at checkout; estimated delivery is 10 to 20 business days. Customs duties and import taxes are your responsibility.

Men's Alpaca Wool Boxer Briefs: 160 Ultralight

Why Alpaca wins

Alpacas en los Andes peruanos

Comfort starts next to your skin

Alpaca wool brings breathable comfort to your first layer. Wash intimate apparel after wear to keep it clean; natural odor resistance doesn't replace regular care.

Designed and made in one country

Peru, start to finish

A family company

Arms of Andes is a family company with roots in the Peruvian Andes. “Arms” brings together the initials of four siblings. That connection to Peru shapes what we make and where we make it.

Peru, start to finish

From fiber sourcing and yarn spinning to knitting and sewing, production stays in Peru. One country, with the people and knowledge behind your gear close together.

Learn our story

Customer Reviews

3.86
Based on 50 reviews

Customer Reviews

Based on 50 reviews
52%
(26)
16%
(8)
12%
(6)
6%
(3)
14%
(7)
C
Cooper
Nice material, fits small

They fit small. I normally am a large and they were very tight. No returns on underwear.

D
D.
Great Fabric - Bad design

Love the fabric, but the fit makes me sad. No support or much consideration for anatomy. Please give the design the same level of attention as the material.

S
Sherpa
Love these for backpacking/camping

Ultralight. Moisture wicking. No itching. Very little odor, especially relative to other fabrics. What more can one desire in a backpacking brief? Only two complaints are that the fabric is delicate and these are pricey for undies. Even after handwashing these, they lasted about 1 season only (around 20 hand washing sessions) before they started to develop thin spots and then holes. Wash very delicately and maybe they will last you longer.

Hi Sherpa, thank you for taking the time to share your experience. We’re really glad to hear they worked well and were comfortable to wear on the trail. We also appreciate your honest feedback, comments like yours are very helpful. Thanks again for your support!

H
Hunter Arnell
Not Durable Enough

I've bought quite a few wool (alpaca and sheep) underwear, and these had the worst durability. I wash all of them the same: cold water, low heat. Smartwool broke down after 31 washes, Woolly has survived 65 with no issues, but these fell apart after only 7 washes. The fabric under the crotch is single layer, and it developed multiple tears really quickly. I liked the shirt I got from here, but I don't believe their underwear is worth your time or money until they double up the fabric in weak areas.

R
Reflect
Inseams are too short, Waistband uncomfortable, IMPOSSIBLE TO RETURN (Any purchase is final sale)

I ordered a 5 pack of these, opened the package and was disappointed to find that the inseams were about 1-2" which clearly would ride up and be uncomfortable with any type of movement, and the waist band is not seamless — it has a large vertical bar tack stitch which is more than 3/16" in thickness and presses into your right side.

I communicated my disappointment here and asked for a return and was denied several times despite my best efforts in communication because I OPENED THE PACKAGE to see the garment. The garments were in perfect unworn condition as they originally specified, but upon emailing them photos of the garments per their request, they replied stating that because the package was opened they were unreturnable.

I think this is a massive failure on their part that it is basically impossible to see the garment without it being final sale. I'm now out $200 and am trying to figure out what to do with the material because they're not wearable for an active person like myself. If I could upload photos of the garments I would just so other people wouldn't fall into this same pitfall.

The second you open the package it is impossible to return, so buyer be ware.