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Phase SL Boxer
Slide on the Arc'teryx Men's Phase SL Boxer before you pull on your ski pants, or climbing shorts, 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 stretched-out, cotton boxer is over.
- Performance boxer with moisture management in high-output activities
- Silkweight fabric wicks moisture for dry comfort in warm temps
- Flatlock seam construction eliminates chafe for enhanced comfort
- Snug fit and gusseted crotch provides a full range of motion
- Treated with anti-odor finish for freshness during extended use
- Item #ARC00KG
What do you think about this product?
October 28, 2019
You know you're wearing them
Long and hot and slightly itchy. If you like feeling and knowing that you have compressive underwear on then you'll love them. I did not. I switched to Underarmour which are much less dominating
July 9, 2019
I want to love them but..
There is no fly opening! Otherwise they are perfect.
May 29, 2019
Worth the price
I bought two pairs for a three week adventure through Tibet when I knew that access to a laundry machine was going to be a fairy tale. For how thin these are they have held up extremely well to self-washing under the sink and dry out overnight even in wetter high altitude environments after being wrapped and rung out in a towel. I wear a size 31 waist and ordered a size small. I'm hovering around the national average in terms of size down there and haven't been bothered at all by the compression. I also use these when i go climbing and they breathe and move very well. Highly recommend!
January 16, 2019
Great underwear for an active lifestyle
These are great for skiing and hiking. They wick moisture well and don't get too stinky.
July 14, 2018
Comfortable, Stays Dry
These have a comfortable fit, and stay in place with lots of movement. They do a great job at keeping dry when conditions cause you to sweat. Only negative is the price, although they do seem to be worth the premium.
February 6, 2018
compression +Arc'teryx = great
these are well made, give good compression, and are a great base layer underwear for skiing or to wear everyday
January 2, 2018
Hard to beat Arcteryx!
When you are buying Arcteryx, you are buying quality. Bought these for running/hiking and couldnt be happier. They dont ride up, they wick moisture, and fit great. Going to order more
September 7, 2017
Used all over Costa Rica - awesome!
These are a fantastic wear for all around activity. I wore these several of the days in Costa Rica and they were awesome. Easy to wash in the sink and dried fast. annoying to not have the opening at the front, but not a deal breaker. didn't ride up and they are keeping together well.
August 29, 2017
Slightly tighter than the old version but remains to be perfect fit. It stays in shape throughout the day irrespective of intense activities with heavy sweat, or sitting behind desk. Perfect balance between elasticity and holding power to stay in shape. Folds into tiny volume and dries in no time - ideal for travel.
May 21, 2017
This is the best underwear I've ever owned, I just wish it wasn't so expensive (hence only 4 stars). I wear mine hiking and have found it doesn't restrict movement, wicks moisture, dries quickly and doesn't readily smell. If they were a bit cheaper then I'd buy enough pairs to always wear them.
April 29, 2017
No room up front!
Hate to give a one star, but these are unusable for me. I am not going to return used underwear so I am out way too much money on these things. Not even close to enough room up front, anyone who needs a little room will know what I mean. Would recommend people check out the "MyPakage" brand underwear sold on backcountry, save yourself the $45.
Southeast Goat Crusader
March 16, 2017
Worth the money
These are amazing.
August 26, 2016
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August 21, 2016
If you can afford them, get them.
If I could afford to only wear these, I would. They are super comfortable and after several washes, show no signs of wear. Are they worth the $$? I dunno. They sure are great though.
June 1, 2016
This is a low rise underwear. Very comfortable. Spend 3 days in the mountains.
October 28, 2015
Tight enough to eliminate chaffing but not to squeeze the fun out of your activities. Expensive but worth it, I highly recommend.
March 30, 2015
It's nice and good fit, didn't try it for a hike yet :) The quality looks but, not sure if it can last long or not... a bit expensive if it didn't last long.
Wai Chung L.
March 17, 2015
Top Drawer Underwear
Lack of a fly prevents unexpected appearances. It works for me. Size XL fits a 36 inch waist regardless of the size chart.
December 10, 2014
Can get better for the price.
The quality seems to be good. I've had these for over a year and they are holding up fine. However, they I still get chaffed wearing these sometimes. Even on shorter hikes. I have boxer briefs from other companies that prevent chaffing a lot more and cost less. Also there is no fly hole. Not sure why this bothers me because I don't use it but it does. For everyday these are fine but for longer trips in the backcountry I would look for something else and save a few bucks.
November 10, 2014
You can't put a price on chafe-free
Are these expensive? Yup. Do they lack a flyhole? Yup. Do they chafe? Nope. And that's the most important thing when you're out on the trail. Arc'Teryx has made these ultralight, yet surprisingly durable. The seams are well-stitched, and well-placed. The fabric is smooth on the inside and out to prevent friction. As an added feature, these breathe better and wick moisture better than other poly-weaves; phasic fabric doesn't just feel nice: it's superior. Add in silver-ions to fight stank and funk and you have some great skivvies here. I've used my first pair consistently in rotation for 6 months, and have decided they're great enough to purchase a second pair. For fit: I'm 5'9", 160 lbs with a 30-32" waist and slim legs. Size small fits comfortably.