Arcteryx Men's Phase SL Boxer
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Arcteryx Men's Phase SL Boxer

Arcteryx Men's Phase SL Boxer is rated 4.8 out of 5 by 22.
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4.6 Star Rating
$35.99 - $45.00
up to 20% off

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Product Description Item No.   10313399

Products on Sale are Discontinued Styles or Colors.

FEATURES of the Arcteryx Men's Phase SL Boxer

  • Next Gen Phasic SL fabric provides a softer touch, improved stretch and exceptional moisture management
  • Flatlock construction improves next-to-skin comfort
  • Gusseted crotch for mobility and comfort
  • Durable Anti Odour finish
  • Updated style lines and improved fit
  • Mechanical stretch textile for unrestricted mobility
  • Flatlocked seams lie flat for added comfort
  • Anatomical shaping for fit and comfort
  • Comfort waistband with laminated, soft-brushed finish
  • Non-chafing label
  • Phase SL is finished with Arcteryx DOA anit-odour finish

- + Product Specifications
Product Technology: Arcteryx Phasic SL
Short Rise: Mid
Disclaimer: We only ship this brand to US Addresses.
Weight: 1.9 oz
Clothing Fabric: Polyester
Fabric Details: 100% Polyester
Gender: Mens
Features: Moisture Wicking, Packable, Quick Drying, Anti-microbial
Best Use: Multisport
Fit Type: Skin Tight
Arc'teryx Phasic SL

Arc'teryx Phasic SL
Arc'teryx Phasic is an innovative technology engineered for baselayers. It pulls moisture off of your skin and disperses it over a wider surface area, allowing for faster dry times. Phasic SL fabrics are utilized in lightweight layers that excel at keeping you cool and dry in warm weather activities. Plus it minimizes odor.

Check Out All Phasic SL Products >

Rated 5 out of 5 by from I agree: this is the "perfect boxer" I wear a large and I have a 37" waist, weigh 220 lbs, have a 34" inseam, and am a very lanky 6'2", if that helps anyone out there. They don't stink after prolonged use. Super comfy and chafe free. Not overly tight waistband. I actually look forward to putting them on. Would own more of them, but the price keeps my collection down to three. Girlfriend likes them. Kind of feel like lightweight wool. NEVER overheat in them. They feel good against my skin. No complaints here. You will like them, I think. Wear them every day that they are clean. I don't worry about washing them (I set the dryer on medium).
Date published: 2014-06-18
Rated 5 out of 5 by from The only boxer brief you'll ever want to wear Best boxer briefs. Period. Worn, all the other outdoor brands and non outdoor brands and non come close. These things fit perfectly, hold their shape, and don't stink after multi day use. Get a pair... or 5 pairs
Date published: 2011-08-21
Rated 5 out of 5 by from Best of the best The best fitting (for my body), most comfortable underwear ever made. I live in Vancouver where it rains 8 months a year and I ride my bike almost every day, so if I wear cotton underwear, they get wet and stay wet seemingly for days. These bad boys dry out quickly and seem to still dry out quickly even if I leave them on. Arcteryx, I don't know how you continue to raise the bar with everything I buy.
Date published: 2011-12-13
Rated 5 out of 5 by from Indispensable. One of those problems not many men will talk about....erm......'moisture management' in THAT area. Crazy, because it's one of the worst problems for us outdoor types. When you're soaking wet after only ten minutes of a ten mile hike, you know you're going to have problems days, perhaps weeks after. These boxers fit perfectly, wick amazingly and see supremely comfortable, all day, not matter how hard I push. Another winner.
Date published: 2013-01-17
Rated 4 out of 5 by from Great product with a medium-size design flaw As the other reviewers have already stated, these boxer briefs feel great against your skin, kind of a satiny feel. They provide good support as well and dry nicely. I only use them for running and other athletic activities of a short duration (<3 hours) because of a simple oversight in their design. There's no opening in the front of the boxers. So, if you make the mistake of wearing these to a public place, you'll need to pull down your pants and boxer briefs to mid-thigh to do so. I guess it's not a big deal just to go to a stall, but it's enough to take it from 5 stars to 4 stars for me.
Date published: 2012-08-11
Rated 4 out of 5 by from Breathe great, feel amazing but they slide up on you These breathe exceptionally well and the material feels great for sure. I like how most types of pants/material glide easily over top of them which I find to be the biggest plus for these. I was originally going with 5 stars, but it seems that after a few uses/washes, they have slightly stretched or something, resulting in the fabric pulling up on my thighs and bunching uncomfortably in the front (enough said) when doing anything much more than walking, I have tried 2 different sizes over the past few months and same result, so I don't know if the answer is a tighter elastic around the bottom of the thigh or what, but it gets old having to pull them down. Despite this, they are still a better product than any generic boxer brief for active pursuits and I would recommend them. Also, don't expect to get anything for insulation from them, they are designed to breathe, not insulate.
Date published: 2013-02-02
Rated 5 out of 5 by from Extrememly comfortable and quick drying. These are by far the most comfortable boxer shorts I have ever purchased. They dry overnight easily, even in the winter alone, after a downpour.
Date published: 2011-11-20
Rated 5 out of 5 by from Most comfortable synthetic boxer I've ever owned I have tried other synthetic boxers, mainly from under armour and they irritate my skin. I have worn these Phase SL boxers all summer during the day (not at night) and they never irritate my skin. Very comfortable and dry quickly. I like that they don't have a fly in the front or opening because that may lead to irritation. These boxers are a worth while investment and are very durable. I have had some pairs for two summers now and they have shown no wear except around the waistband. The waistband looks slightly ruffled when not wearing them.
Date published: 2014-09-02
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- + Size Guide

Men's Jackets, Shirts and Tops
SIZE X-Small Small Medium Large X-Large XX-Large
Chest 36" 38" 40" 43" 46" 50"
Waist 29" 31" 33" 36" 39" 43"
Hip 36" 38" 40" 43" 46" 50"
Sleeve Length 32" 33" 34" 35" 36" 37"
Numeric Size 36 38 40 43 46 50

• Arc'teryx recommends you calculate your body measurements using the info in the Measurement Guide below before selecting a product size. The measurements provided in their size guides refer to your body measurements unless otherwise specified.

• Check the fit type in the product FEATURES and SPECIFICATIONS and refer to the Fit Guide below to ensure you are ordering a product for the correct end use.

Men's Pants
SIZE X-Small Small Medium Large X-Large XX-Large
Waist 29" 31" 33" 36" 39" 43"
Hip 36" 38" 40" 43" 46" 50"
Length (Short) Subtract 2"
Length (Regular) 30 1/2" 31 1/8" 32 3/8"
Length (Long / Tall) Add 3"

• Please note that the actual pant length may vary slightly from the info above, depending on the intended end use of the product.

Men's Numeric Pant Sizing
SIZE 28 30 32 34 36 38
Waist 28" 30" 32" 34" 36" 38"
Hip 35" 37" 39" 41" 43" 45"
Inseam 32" 33" 34" 35"

• Several models of Arc'teryx pants are sized numerically and available in different inseam lengths. You will see these sizes reflected in the options in the Select a Size drop down menu for particular products.

• For all other pants available in numerical waist sizes where the inseam length is not specified, the inseam lengths provided above apply.

SIZE Small / Medium Large / X-Large
Head Circumference 21.7 - 22.4" 22.8 - 23.6"
Men's Gloves
SIZE X-Small Small Medium Large X-Large
Hand Width 7.6 - 7.9" 7.9 - 8.2" 8.2 - 8.6" 8.6 - 8.9" 8.9 - 9.3"
Hand Length 7 - 7.2" 7.2 - 7.5" 7.5 - 7.7" 7.7 - 8" 8 - 8.2"
Unisex Gloves
SIZE X-Small Small Medium Large X-Large
Hand Width 7.3 - 7.6" 7.8 - 8.1" 8.2 - 8.6" 8.6 - 8.9" 8.9 - 9.3"
Hand Length 7 - 7.2" 7.2 - 7.5" 7.5 - 7.7" 7.7 - 8" 8 - 8.2"


Chest / Bust - Measure around your chest / bust, holding the measuring tape under your armpit.

Waist - Measure around the natural waist, which is often the narrowest part of your waist.

Hip - Measure around your hips at the widest part.

Sleeve Length - With your arms in a slightly bent position, measure from the center of the back of your neck, along the length of your arm, to the wrist.

Inseam / Pant Length - From a standing position, measure from your crotch to your ankle.

Head Circumference - Measure the full circumference around the widest part of your head.

Hand Length - Measure from the tip of your middle finger to the base of the palm.

Hand Width - Measure the circumference of your hand around the knuckles, excluding the thumb.

• Please note that all the info provided above refers to body measurements, and NOT the dimensions of the garment.


Next to Skin Fit - These snugly-fitting garments are made with stretch fabrics to fit next to the skin to enhance moisture management and thermal efficiency. Garments in this fit category when constructed using Arc'teryx's heavier-weight AR and SV fabrics also perform very well as mid layer pieces, and users should consider selecting a larger size to accommodate a base layer underneath if the intention is to use this layering system as a mid layer option.

Trim Fit - Trim-fitted garments share the motion-friendly traits with Arc'teryx "Athletic" fit garments, but are patterned with lower volume for reduced bulk. These close-fitting pieces layer well under other garments.

Athletic Fit - This is the "Arc'teryx Standard" fit. These complete patterns utilize anatomical shaping and gussets to enhance motion by minimizing excess bulk. Easy layering under or over each item extends seasonal versatility and comfort.

Relaxed Fit - Relaxed fit garments rely on higher volume patterns and a reduced amount of articulation to offer roomy mobility.

Expedition Fit - Cut roomier than the Arc'teryx Athletic fit and suitable for winter/extreme conditions, Expedition (XPD) fit garments are cut larger to accommodate multiple layers without binding or restricting movement.

• You can find the fit type and additional fit info for Arc'teryx styles in the product description FEATURES and SPECIFICATIONS.

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