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Discontinued Product!

The Klim Aggressor Brief
has been replaced by the:
Klim Aggressor 1.0 Brief
Klim Aggressor 1.0 Brief Replacement Product:
Klim Aggressor 1.0 Brief
Out of Stock
Klim Aggressor Brief
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  • Klim Aggressor Brief - Black
  • Klim Aggressor Brief - Black

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MSRP
$29.99
Savings (20%):
$6.00
Price
$23.99

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Klim Aggressor Brief

KLIM’s Aggressor Brief is the most comfortable, non-padded riding short KLIM has ever created. Utilizing the same moisture-wicking, breathable, fast drying and ultra-comfortable four-way stretch material as the Aggressor Shirt and Aggressor Pant, this low-profile short will soon be your favorite riding brief for all temperatures and all rides. Choose your next-to-skin layer intelligently and you’ll be drier and ready for more miles every time.

Features:

  • Contrast stitching
  • Patterning removes in-seam seam for ultimate riding comfort
  • Athletic contoured patterning
  • Anti-static comfort control
  • Breathable, moisture- wicking poly/Spandex fabric
  • Anti-microbial and fast-drying
  • Four-way stretch
  • Non-abrasive elastic comfort waist
  • Flat lock stitching
  • Tagless
  • Front fly
Bang For The Buck
4.6 / 5
Protection & Durability
4.3 / 5
Features
4.4 / 5
Comfort
4.6 / 5
Style
4.6 / 5

Klim Men's Base/Mid Layer Pant Sizing

Size Waist (in) Inseam (in)
XS 29 - 31 29
SM 32 - 34 30
MD 35 - 37 31
LG 38 - 40 32
XL 41 - 43 33
2XL 44 - 47 33
3XL 48 - 51 33

Sizing information is provided by the manufacturer and does not guarantee a perfect fit.

How To Measure

W Waist Measure around your natural waistline, around the top of the hip bones, inline with the navel while keeping the measuring tape parallel to the ground.
I Inseam Measure from the highest point of your crotch down to your ankle, along your inner leg.
Product Style RevZilla Item # Manufacturer Product # Availability
Black / XS 842903 3358-003-110-000 Out of Stock
Black / SM 842904 3358-003-120-000 Out of Stock
Black / MD 842905 3358-003-130-000 Out of Stock
Black / LG 842906 3358-003-140-000 Out of Stock
Black / XL 842907 3358-003-150-000 Out of Stock
Black / 2XL 842908 3358-003-160-000 Out of Stock
Black / 3XL 842909 3358-003-170-000 Out of Stock

Shipping

Orders $39.99 and over qualify for our fast free shipping offer. Click Here for FREE Shipping Terms and Conditions.

Please see our International Orders page for orders shipping outside the US.

We show real-time availability on this product page when you select the size/color item you want.  Most items will ship the same business day an order is placed,however if an item requires additional processing time a message will be shown indicating such.

See our full Shipping Policy for further details.

Returns

If your order arrives and it is not right, we will we'll fix it, NO NONSENSE, we promise.

Doesn't fit or just not happy with it? You can return any new, unused and unaltered item within 30 business days of delivery receipt of your item. We will issue a full refund to your original payment method.

See our full Return Policy for all of the pertinent details.

Write a Product Review for a chance to win our monthly $100 giveaways.
4.8 / 5.0
15 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
13
1
1
0
0
Bang For The Buck
4.6 / 5
Protection & Durability
4.3 / 5
Features
4.4 / 5
Comfort
4.6 / 5
Style
4.6 / 5
Air Flow
4.5 / 5
Bang For The Buck
5 / 5
Protection & Durability
5 / 5
Features
4 / 5
Comfort
5 / 5
Style
5 / 5
Air Flow
4 / 5
Very Comfortable
Did a quick 250mi ride to try these babies out right after buying them. They performed great and never experienced the typical issues associated with other garments. Don't have to be on the bike to appreciate them either. So comfortable I'm considering buying a pair for every day of the week! I will spare everyone by not uploading a photo.
April 6, 2014
Bang For The Buck
4 / 5
Protection & Durability
5 / 5
Features
5 / 5
Comfort
5 / 5
Style
5 / 5
Air Flow
5 / 5
Never thought I'd be writing about underwear...
... But these are a notable exception. I've always been a cotton kind of guy except for paddling, cycling, and various other high-friction pursuits. At a friends suggestion I gave a pair of these a shot and now I won't wear anything else. They're ideal for layering and overall hind comfort. The difference in butt-comfort at the end of the longer days is profound in comparison to cotton. I'll be getting a few more pair for the longer hauls.<br><br>Construction, fit, comfort, and durability are typical for a KLIM product: Excellent.<br><br>In my opinion you cannot go wrong with these briefs as long as they come in your size.
April 22, 2013
Bang For The Buck
5 / 5
Protection & Durability
5 / 5
Features
5 / 5
Comfort
5 / 5
Style
5 / 5
Air Flow
5 / 5
Great for summer
Bought these to use riding in Big Bend Texas in July. These Klim aggressor briefs were very comfortable in 100+ temps in the desert. I wore jeans over them.
July 15, 2014
Bang For The Buck
3 / 5
Protection & Durability
4 / 5
Features
4 / 5
Comfort
4 / 5
Style
4 / 5
Air Flow
4 / 5
Comfy and dry
Keeps me dry and are comfortable. No bunching up either. Nice true fit<br>I would recommend this product.
September 1, 2014
Bang For The Buck
5 / 5
Protection & Durability
5 / 5
Features
5 / 5
Comfort
5 / 5
Style
5 / 5
Air Flow
5 / 5
All day riding
Great fit and they breath really well. Washout and dry overnight. Solid waist band and the crotch area is very accommodating.
April 2, 2015
Bang For The Buck
5 / 5
Protection & Durability
3 / 5
Features
5 / 5
Comfort
5 / 5
Style
5 / 5
Air Flow
5 / 5
Aggessor Brief
I bought a couple pair of Aggressor briefs for track day riding and had a chance to try them last weekend. They were nicer and even more comfortable than I expected them to be. I washed them last night and they came through the wash just fine. I'm sure I'll be wearing these more often than I originally planned.<br><br>I would recommend them without reservation.
September 30, 2013
Bang For The Buck
5 / 5
Protection & Durability
5 / 5
Features
4 / 5
Comfort
5 / 5
Style
5 / 5
Air Flow
4 / 5
Road tested
I bought a couple pairs of these to try on a recently completed ride of a little over 1800 miles. I probably own 3 or 4 different brands of riding shorts and these just went to the top of the list. Very comfortable, no chaffing, great fit and feel, as well as a good price point. I'm thinking I may need to order a couple more pairs from ZLA. Highly recommended.
May 26, 2014
Bang For The Buck
5 / 5
Protection & Durability
5 / 5
Features
5 / 5
Comfort
5 / 5
Style
5 / 5
Air Flow
5 / 5
Great product!
I've been using these for a few months and have zero complaints the fit & feel is great. No bunching, breathes well.
September 12, 2014
Ride:
2012 Triumph Tiger 800 XC
Bang For The Buck
4 / 5
Protection & Durability
4 / 5
Features
4 / 5
Comfort
5 / 5
Style
4 / 5
Air Flow
5 / 5
No comprimise.. pure comfort
Klim Agressor is the best short I've ever used. I definitely recommend this product for adventurers. It's elastic, breathable and fits well.
August 20, 2014
Ride:
2014 BMW F800GS
Bang For The Buck
5 / 5
Protection & Durability
5 / 5
Features
5 / 5
Comfort
4 / 5
Style
5 / 5
Air Flow
5 / 5
Biker Skivvies
Durable, comfortable, wicks, and dries overnight when hanging.
April 2, 2013
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Have a functionality, fit, or otherwise product-specific question about the Klim Aggressor Brief? Ask it here! If you have a customer service or shipping question, please direct it to our Customer Service department.

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Browse 3 questions Browse 3 questions and 32 answers
Why did you choose this?
RevZilla Store
Its hot in florida and it will be the best way to survive the warmer months.
Kahlua on Mar 16, 2016
Try them out they make the ride not ride up
Rich P on Feb 2, 2016
Its hot in florida and it will be the best way to survive the warmer months.
Kahlua on Mar 16, 2016
To try them, don't work any better than any other for ME
harry g p on Mar 9, 2016
Try them out they make the ride not ride up
Rich P on Feb 2, 2016
why choose anything else
Stephen H on Nov 27, 2015
because of sale price and I do not have any riding brief. and the price is worth a try
Gary W on Sep 24, 2015
More comfort, breathable, wicking, no seams.
firstoff on Sep 19, 2015
These are fine and all for those days when you get hot and bothered and want to stay cool but if you're used to wearing boxers these will feel odd; and they really like to help your pants slide off if they're not fastened properly.
Ken B on Apr 2, 2015
good reviews, fairly priced. Worth a buy to see if this product can fit my needs as I am doing a lot of riding this year.
Vincent V on Mar 18, 2015
Have purchased them in the past and they work great. You don't know what you are missing until you try them.
Ryan B on Feb 8, 2015
Purchased as a gift for son-in-law who is an avid motorcycle rider, snowmobiler, and snowboarder who has always wanted Klim apparel.
Cindy K on Dec 13, 2014
I have a pair of LD underwear, which I find are too tight. These are excellent. I tested them against LDs, my regular Duluth 'Naked' boxers and another pair last weekend. They came out on top as the most comfortable by far.
D A on Nov 3, 2014
Not my best purchase.
Kevin M on Oct 8, 2014
Thought I'd try something other than cotton underwear to see if it made that much difference on a mid to long ride.
S T on Sep 27, 2014
Riding to Big Bend, Texas in July. Needed comfort for long ride in hot weather.
William H on Sep 10, 2014
Brand reputation and customer reviews on wicking capability- needed for two week road trip
Chris W on Jul 20, 2014
Good user reviews from other customers.
Scott L on Jun 23, 2014
There comfortable and last a long time.
Worked great in 108'F weather. Very comfortable.
Lukas v on Jun 2, 2014
All the briefs rated well, but these had a front fly.
Jeffrey S on May 23, 2014
the seams in the crotch drive me crazy. LDcomfort shorts work better. These are just cluttering my sock drawer.
StacyTrotter on May 8, 2014
2nd pair , very comfortable and seem to help with the monkey butt
darren a on Apr 13, 2014
The seams on my tighty whities were killing me!
Hansrober on Jan 12, 2014
Comfortable and will dry over night when I wash em out at the end of a day.
Jim M on Sep 9, 2013
Long range comfort and Klim reputation for quality.
John on Sep 9, 2013
To try them, don't work any better than any other for ME
harry g p on Mar 9, 2016
why choose anything else
Stephen H on Nov 27, 2015
Which size would I get with a 34" waist?
David C on May 24, 2014
BEST ANSWER: I have a 34 waist and wear the Medium. Just a note, I have a slim legs.
Are they true to size? if so, what is Klim size chart?
A shopper on Mar 22, 2014
BEST ANSWER: I ordered the same size that I wear in similar style Haynes underwear. They fit as they should.