Zepher Boxer Brief

# 662 | Men'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.

Our warmest boxer layer for the most athletic pursuits. Keep out the cold where you need warmth the most. Machine wash. Made in the USA

Tech Specs +

  Fit Guide
Wool Gauge:
Fabric Gram Weight:
 230 g/m2
Garment Weight:
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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4.3 / 5.0
32 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
the best undershorts for hiking/climbing
This my favorite outdoor/backcountry short, for hiking, climbing and skiing, because it's cut a little bit longer, perfect under shell pants or with another layer in the cold.
August 10, 2010
Warmth and comfort for the long haul
Three days of skiing the Resurection trail in Alaska and the roaster was comfortable, warm and ODOR FREE!!! Simply the best backcountry next to skin boxer I have ever worn for skiing and cold weather camping. by the way - I liked the old name - the 'nut roaster'!!!
September 15, 2007
Comfortable & versatile
Comfortable, versatile, and a style that I like. This is my second order of this product. Basically, they're good for just about anything.
September 17, 2009
Great comfort and warmth
My hips get cold when I sit all day in my cold/moderate office...unless I'm wearing my Zepher Boxers. They warm me right up, and keep me warm, while the rest of me is comfortable.
In the office, I usually wear them over cotton briefs to keep them from having to be washed as often.
In the great outdoors, I wear them occasionally. I'm a little laundry-shy, so they are usually not my base layer. If I
January 18, 2010
best underwear, ever
i absolutely love this product from Ibex. I now own a small fortune in this underwear style, and they are worth every penny. My only complaint is that sometimes the waist band twists in the wash, and you have to "un-twist" it. It is not hard to do, and is kind of a petty complaint.

I wear these for everything, BC skiing, hiking, fishing, work, casual, you name it!
November 23, 2010
great winter boxer. 6'3" and lean, and the large fit perfect. snug, but not too tight at all.
January 11, 2011
A great item. This is my 3rd pair.
This is my 3rd pair. Not because the other have worn out, but that I wear them pretty much all the time in the winter (I am wearing a pair right now). I figured an extra pair would help me either A: help keep the laundry loads less frequent. Or B: keep the grunge factor down.
They are great for any outdoor activity, but my preferred uses are when I am either telemarking, or xc skiing out in the wo
January 11, 2011
the only option
I have one rule... I won't wear underwear unless it's wool. I'd rather go commando than wear cotton boxers. That is why I wear Roaster Boxers every day (Completely true). For the super intense activities, I would definitely take the Balance Runner Short, but for everything else it has to be the Roasters. If you're already sold on wool, and Ibex, but not sure about the Roaster Boxers, then buy
June 11, 2009
I Love these!
I have 5 pair and it's not enough. These are great for everyday use, on the bike, in the woods, whatever.
April 24, 2008
If you don't own a pair you should
wear with woolies...extra layer keeps me warm on ski lifts
January 17, 2013