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Answer the age-old question, ‘what underwear should I wear for this week’s backcountry escapades?’ Pull on the naturally odor-resistant Arc’teryx EON SLW Boxer.

  • Merino wool stays warm even when wet so you don’t get chills after sweating or peeing yourself after nose-diving into a powder bank
  • Gusseted crotch allows full range of motion for when you’re carving turns or hiking out of a bowl
  • Highly resilient stretch maintains skin contact to maximize thermal efficiency and reduce layering bulk
  • Flatlock seams add comfort and minimize chafing so you can go hard during après-ski time as well as ski time
  • Reviews
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  • Fit:True to size

I have never put on a pair of underwear and felt impressed. The fit is taught not tight. The seams are extremely smooth. Who doesn't love merino wool on cold days after working up a sweat.

Hard to believe I justified spending almost 50$ on boxers, but comfortable layers are my trail luxury.

Large for 6'3 195 34" waist average inseam

The best

  • Familiarity:I've put it through the wringer
  • Fit:True to size

I use a pair of these everyday. I am not doing anything extreme. Just work type stuff. I live in Bogota, Colombia though and the high altitude temperatures can get pretty chilly. I definitely sweat less in these and that keeps any odor down. All in all five stars.

Sexy and non smelly

  • Familiarity:I've put it through the wringer

I have had these for years, I like them a lot. Package looks great in them, and feels great!

Seriously though, wool is great, warm and non smelly even after days of use. Merino does break down after a few years of use, the ones I have now are getting on two years old and have a few small holes in them but not many.

I wear a medium and am 175 6 foot.

Comfortable w drawbacks

    Note - This review is for the original EON SLW boxers, the newer model may be improved.

    I ordered four pair of these boxers a little over a year ago and they didn't hold up well. I have many merino wool products and take very good care of them - cool/gentle wash and hang dry. These were great while they lasted, but for the price they didn't last as long as you'd expect. Every pair has numerous holes and two of them are completely unwearable. I hope Arcteryx took endurance into consideration for this release because I would love to order more of them. Unfortunately, I will have to wait until others have put them through the test of time.

    Worth the price

      Confession...I have not really compared other brands and cannot really say if others are better or not in this category, or others for that matter. The fact is Arcteryx is a brand that I go to first, and 99% of the time I get a product from them that is worth the premium paid and does not leave me questioning why I bought any of their products.

      That said, the Eon SLW Boxer is no exception. I have a couple of the RHO LTW Merino tops and found the merino to be a bit softer in the boxer which is great for the area the garment is covering. It retains heat yet does not over heat. I find the synthetics used in under armor get a bit stank, but, as advertised, the merino resists odor. I have worn them as undergarments a number of times in +20F weather. On a couple of occasions I wore them in combination with the RHO LTW tights when the mercury dropped below 20F and the wind chill was nasty. They have worked well wearing them casually as well as while exercising/hiking/skiing.

      Totally worth it if you ask me. If we were having consistently colder weather on the East Coast, I would have flipped for another pair.

      A note on sizing since it is the one thing that is uncertain when ordering online. I am 6'1" and a fit 195lbs and went with the Mediums; they fit my body type perfectly.

      Better than synthetic. I won't go back.

        I would have balked at the price for a single pair of drawers, but with a $20 gift card and some birthday money, I went out on a limb for a bit of luxury. No regrets.

        Synthetic skivvies tend to go rank in a few hours and they're petroleum based materials. These are made from sustainable all-natural materials. Wool is naturally breathable, moisture-wicking, odor-resistant and retains its insulating properties even when wet. The merino wool isn't itchy at all and is softer than cotton, but it breathes and wicks like a synthetic. Best part was that after 5 days on the trail these still weren't too rank. Amazing.

        Well-cut and good seam placement means they don't chafe or ride up. Superlight material- about as lightweight as the ExOfficios.

        Only things I dislike are the lack of a fly (just a personal preference), and the waistband is so thin it tends to roll up on itself. I'd prefer a comfort waistband like on the SmartWool shorts. But I'd buy these again. Highly recommended.

        5'9"/170 lbs. 30-32" waist. Ordered size Small. Perfect fit.

        Hand wash, cold with a mild detergent and these will normally hang dry overnight.