Men's Alpaca Wool Leggings With Fly

Name: Men's Alpaca Wool Leggings With Fly: 160 Ultralight
Rating: 4.33 (3 reviews)

160 Ultralight

$146.16

4.3 3 reviews

Start with full-length coverage and a practical fly. These men's leggings use a fitted 160 g/m² Alpaca knit that layers beneath outer pants without the weight of our heavier fabrics.

Low Impact Dyes

Black

Size: SSize guide

S M L XL XXL

Product variants

This size is currently out of stock. Get notified when it's back.

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.

A full-length first layer with a fly.

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

Coverage under your outer pants
The 160 g/m² knit sits close to your body, with a fly opening for everyday convenience.
Stretch from the knit
The knit stretches naturally as you move, keeping a fitted layer comfortable through changing positions.

Perfect for

Outdoor activities
Travel
Next-to-skin layering

Product details

What goes into your layer

Fabric100% Royal Alpaca wool
Elastic50% Tree Rubber & 50% Cotton
Fabric DyeLow Impact Dyes (GOTS)
Thread100% Pima Cotton
Thread DyeReactive Dye
Label100% Royal Alpaca wool
Label InkSynthetic (GOTS)

Specifications

Fabric weight160 g/m²
ConstructionFull-length leggings with a fly opening
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.

Size	Waist	Hips	Inseam
S	28 - 31 in	33 - 35 in	29.5 - 31 in
M	31 - 34 in	35 - 38 in	31 - 32 in
L	34 - 36.5 in	38 - 40.5 in	32 - 32.5 in
XL	36.5 - 39.5 in	40.5 - 43 in	32.5 - 34 in
XXL	39.5 - 42 in	43 - 46 in	34 - 37 in

Size	Waist	Hips	Inseam
S	72 - 79 cm	84 - 89 cm	75 - 78 cm
M	79 - 86 cm	89 - 96 cm	78 - 81 cm
L	86 - 93 cm	96 - 103 cm	81 - 83 cm
XL	93 - 100 cm	103 - 110 cm	83 - 86 cm
XXL	100 - 107 cm	110 - 117 cm	86 - 93 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.

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.

Eligible unused, unwashed items may be returned within 15 days of delivery. What counts is that you start your request within those 15 days; how long the package then takes to reach us does not affect your refund. Original packaging isn't required. A $5 domestic return shipping fee applies unless Free Returns was purchased at checkout. International return shipping is paid by the customer, except for wrong or defective items under the policy.

Full shipping & return policy

Men's Alpaca Wool Leggings With Fly: 160 Ultralight

The benefits

Why Alpaca wins

Andes-adapted for changing temperatures

Alpacas evolved where days run warm and nights turn cold. Their semi-hollow fibers trap insulating air, helping you stay comfortable as the temperature changes.

Softness starts in the fiber

Alpaca’s smoother scales give the fabric a soft feel against your skin. Comfort comes from the fiber’s structure.

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.

Single origin

Peru, start to finish.

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.

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

5 stars: 2 (67%)
4 stars: 0 (0%)
3 stars: 1 (33%)
2 stars: 0 (0%)
1 star: 0 (0%)

Good length and light feel, but fragile

I initially liked the softness and feel of these leggings. Unfortunately during the 3rd time I put them on, a 2inch hole ripped in the back hamstring while pulling up the waist! It was a bummer because it seemed like I wasn’t even trying to squeeze into them as I’m a pretty skinny build (32” waste and 38” inseam). Hoping they have some repair swatches so I can stitch a patch on?

Excellent "long johns"

Much lighter and more comfortable than traditional "long johns". I was able to try these in quite cold and windy weather recently, and in combination with regular trousers, I was able to walk and work in the storm, yet not become overheated when getting back into the house. A wider range of temperature comfort compared with either lined pants or with lighter pants over tradition long cotton underwear.