Zepher Long Janes

# 643 | Women's


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The Ibex Promise
We’re committed to uncompromising craftsmanship and to your satisfaction. If you are unsatisfied for any reason, return your purchase within 60 days with proof of purchase to receive an exchange, repair, or refund. It's our promise.

A wool long underwear bottom that would make arctic adventurers proud. Made from 18.5 micron Zepher fabric with a form fit cut and next-to-skin softness. Mad warm pants.

Tech Specs +

  Fit Guide
Wool Gauge:
Fabric Gram Weight:
 230 g/m2
Garment Weight:
 5.44 oz
Fiber Content:
Fiber Source:
 New Zealand
Fabric Source:
 New Zealand
Garment Source:
 United States

Wool Type +


We developed our ultra-versatile, midweight 100% New Zealand Merino wool baselayer Zepher fabric using an interlock stitch. This simple, double knit stitch forms a fabric that offers high performance, great natural stretch and recovery. Its smooth surface enhances softness and layering ease. The fabric is "no stink," sustainable and machine washable and is the ultimate baselayer choice.

Size & Fit Guide Expand +

How Do I Determine My Size?

We recommend a general body measurement guide to determine your size in Ibex clothing. This sizing chart is not garment specific, but in fact a body measurement chart. Here are some helpful hints when measuring:

Bust/Chest: relax arms at sides, keeping the tape parallel to the floor, measure the fullest part of your bust/chest
Waist: keeping the measuring tape comfortably loose, measure around your natural waistline
Hips: standing with heels together, keep the tape straight and parallel to the floor, measure around the fullest part of hips
Sleeve Length: a 3-point measurement, standing with arms relaxed and slightly bent at sides, measure from the base of the neck to the shoulder and then from the shoulder to the wrist bone, add together measurements
Form-fit: garment designed to fit snug to the body throughout
Semi-fit: garment will be contoured to the body
Regular-fit: garment will not be slim, but also not oversized
Relaxed-fit: garment drapes loosely on body

Still need help determining your size? Call 800.773.9647 or email us at info@ibex.com for specific garment measurements.

Q&A and Reviews

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Why did you choose this?
Ibex Outdoor Clothing Store
These pants are super-thick wool and super-warm. A must for Fairbanks winters if spent outside. Plus they were a steal to boot!
Susan G on May 28, 2015
These pants are super-thick wool and super-warm. A must for Fairbanks winters if spent outside. Plus they were a steal to boot!
Susan G on May 28, 2015
4.8 / 5.0
45 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
They are now my only ""long johns""
One word....Amazing! This base layer is always the base of only 2 layers.
Cycling and running as low as 25 degrees so far...on the beach. Dog walking rain or snow. I truly use it a lot. No pilling, strong seams, no signs of wear.
Nice wicking ability, never have to remove before that infamous chill.
Perfect for fall and winter especially when the sun is not up yet or already down.
December 13, 2010
Why wear jeans in the cold?
I bought these to be substitutes for Woolies when I want to wear very warm leggings this freezing winter. I've found that I wear them constantly: as leggings with long sweaters, when working in the house, to the gym, etc etc. Super comfortable and not so tight that you're hanging out. Bought a second pair for when these eventually make their way to the wash machine!
February 13, 2011
Great Long Janes
Ok, after I ordered these during one of the coldest, snowiest winters in Maryland in a long, long time - it warmed up. However, our nights are still cool. I have actually been using these as pajama bottoms with a woolie long sleeve top - soooo much better than flannel pajamas on a cold night! Keeps me so much warmer and breaths better than cotton. Maybe we'll have another cold winter and I can
March 24, 2010
Not your itchy sourdoughs.
I was a bit uncertain about getting these, but now I've relegated all the silks and polypro bottoms to the back of the drawer. The Long Janes are a wonderful mid-weight and so soft--absolutely no itching. I wear them tele and xc skiing under softshell pants--not too hot for active sports, but warm enough to keep me comfortable on days in the teens. Legs are long, so all you tall girls should still
December 11, 2007
My favorite longies!
I bought these because I love my Roaster Boxers so much. Same marvellous quality, longer legs! In fact, the leg length is fabulous, not too short. I've worn these as running and biking tights, and under jeans and work clothes. They don't catch on my pants, they don't pill, and they have survived many trips through the washing machine.
December 14, 2007
great legging
I would call this midweight long underwear. A great weight, could be a legging under something else. Expected quality and construction. These relegate my Icebreaker lightweights to backup status. I'm living in these this winter. I went down 1 size for a snug fit.
January 9, 2011
I absolutley love these! They are the best wool long underwear and I have tried all the other main brands.
They are sooo nice and soft and comfortable and fit extremely well too. Great product!! Thanks!
April 11, 2009
Love these Long Janes!
I love these long janes so much that I bought a pair of long johns for my husband and am going to buy a pair of the 3/4 janes too. They fit beautifully and are great under regular pants as well as sports gear like ski pants and waterproof sheels. I use them mostly for cross country skiing and sitting around the fire with a long sweater. I especially appreciate the normal waistline. With so man
January 19, 2008
Wind Chill? What Wind Chill???
These rock my world - I wear them under almost all of my pants come winter in VT. When it is a balmy 3 degrees out and the wind chill drops the temp to a bitter 17 below zero, well I just don't even notice. These keep me warm and stylish - they fit under all pants, regardless of how fitted the outer pants are, leaving me looking great and feeling even better!
January 22, 2008
Wow!! The best cold weather base layer
Warm, comfortable, Never feels clammy.
January 10, 2011