Arc'teryx Men's Phase SL Boxer

Priced: $33.71 - $45.00 Rated:   - 4 stars out of 5 by 3 reviews.
Arc'teryx Phase SL Boxer
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Available Colors: $33.71
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Regularly: $44.95
Moosejaw $34.99 - $44.95
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Regularly: $44.95 $44.95
Mountain Gear $44.95
REI $45.00 $45.00
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Arc'teryx Phase SL Boxer -
FEATURES of the Arcteryx Men's Phase SL Boxer.
SPECIFICATIONS of the Arcteryx Men's Phase SL Boxer.


  • Anatomical shaping for fit and comfort
  • Arc'teryx Phase SL boxers offer a next-to-skin fit


  • Fabric helps repel harmful UV rays if you're out in the sun with just your skivvies on
  • Polyester and polypropylene fabric wicks moisture and keeps you cool during high-output activity and dries quickly to regulate temperature
  • Next-to-skin fit keeps the fabric close in order to help with moisture management
  • Hydrophobic materials will not absorb water
  • Do not use fabric softener
  • Encapsulated silver ions give the fabric the ability to repel odor-causing bacteria
  • Mechanical stretch textile for unrestricted mobility-fabric is inherently stretchy without the use of Spandex fibres, making it more durable
  • Lightweight fabric features a smooth face that makes it easy to wear under additional layers, and mechanical stretch woven into the fabric moves with you
  • Flatlocked seams eliminate uncomfortable seam bulges where two fabric panels come together and cause chafing
  • Phasic SL fabric is highly breathable, lightweight, quick-drying, and flexible enough so you can move freely
  • Phasic fabric has soft touch
  • Antimicrobial, odor-control fabric treatment

Wash and Care:

  • Machine wash in cold water


  • Comfort waistband with laminated, soft-brushed finish

Weather and Wind:

  • Flat locked seams improve next-to-skin comfort
  • Flat locked seams lie flat for added comfort
  • Flatlock seams feel great next to skin; heat transfer label means no annoying tag


  • Minimal odor retention
  • UPF 25+
  • UPF 25 +
  • Non-chafing label
  • Gusseted crotch

Slide on the Men's Phase SL Boxer before you pull on your ski pants, climbing shorts, or work pants, and you'll find a whole new level of comfort during intense activity. Silkweight fabric aids the transfer of sweaty moisture away from your skin, fit details include flatlock seams for comfort, and the close fit provides all the support you need—the age of the cotton boxer is over.
Super-light boxer shorts that are engineered for optimal moisture management during stop-and-go activities.
During active phases, moisture is wicked across the entire garment, aiding temperature regulation.
Entering a rest phase, the broadly dispersed moisture evaporates quickly, speeding dry-time to keep the user drier and more comfortable.
Encapsulated silver-ions provide durable and long-lasting odour control.
Mechanical stretch textile for unrestricted mobility.
Flatlocked seams lie flat for added comfort.
98 g/m² 70% polyester, 30% polypropylene Phasic™ SL.
Machine wash cold, hang to dry.

The Arx'teryx Phase SL Boxer Short are silkweight base layer bottoms. Rapid dry, optimal moisture management suits intense activity, interrupted action, layering or warm environments. Next-to-skin fit permits rapid transfer of moisture.

Mountain Gear
Providing high-performance moisture management in a silky-light package, the men's Phase SL Bottom from ARCTERYX is a superlight baselayer option for high-output interval activities.


Built for high-performance moisture management, the silkweight Arc'teryx Phase SL boxers offer an extra touch of comfort for hiking, spring skiing or anytime you're out in cool weather.


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Review RatingNumber of Reviews
Also available for: Women
Activity:All Around
Back Rise:12 in
Fabric:70% polyester/30% polypropylene
Fabric Weight:Microweight
Front Rise:9 in
Inseam:7 in
Inseam (in.):5.9 inches
Leg Opening:22 in
Material:Phasic SL
Moisture wicking:Yes
Outseam:14 in
Quick drying:Yes
Waist Measurement:28 in
Weight:1.9 oz / 55 g
Compare specifications to related products.

Subcategories of Fleece & Base Layers:

Arc'teryx Phase SL Boxer Reviews:


I have had these for about a year. I have 2 pair and wear them as often as I can, especially in the summer. The material is like no other. It is so light and soft. I can literally see my hand through the material it is so thin, but yet they seem very durable. The material looks as good as the day I bought them. Moisture wicking is fantastic, and it is the only underwear I have tried that keeps me dry even on those hot summer days. I have a pair of ExOfficio, but I haven't had the chance to test these out in the same conditions, so they may be as good. The ExOfficio material is definitely thicker and not as comfortable probably due to the texture. I also like the thinner waist band on these, and I haven't had any issues with it rolling or folding over. Although the waist band doesn't feel nearly as nice as the rest of the material. Last but not least, they cradle the goods very well, and everything feels nice and supportive without being squished. I can't imagine a better fit in this regard.
My only complaints are the price, and the material tends to loosen around the leg until they are washed again. I am 5'10", 160lbs with a 32" waist, and I have the medium. I wish they were a little snugger around the leg even straight out of the washer. Arc'teryx calls it a boxer, but the fit is really somewhere inbetween a boxer and a boxer-brief for me. A person would need some seriously large quads to fill these out. Compared to the ExOfficio boxer-brief, I like the fit in the butt and crotch better on the Arc'teryx, but the ExOfficio definitely fit nicer in the legs if you prefer the legs to have a snug fit.
As good as these are, it's really hard to justify paying $45 for a pair of underwear, especially if they are not perfect. I would give these 5/5 if Arc'teryx would fix the leg stretch issue and drop the price $10.

bjb4091453 at on 05/31/2013

I use it for 3 years now or so, for running (road & trail), for trekking and climbing. it work great and it fast drying. I never have a jock itch with it.
The only problem is that the upper elastic boxer have short life. the rubber get uot after half a year. . . but it still working, just look bad

Guy Geva at on 04/08/2013

Nice and light, packs small, quick drying, good stink proof. Yeah, if you can afford to spend this much on underwear they're great. Oh, almost peehole, bit of a ding.

Albert Greiner at on 01/21/2013