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KLIM’s Aggressor Pant matches the Aggressor Shirt perfectly in delivering premium base layer performance. Dress in the Aggressor Pant and you’ll experience more comfort in all temperatures thanks to the world’s best moisture-wicking, breathable, fast-drying and comfortable four-way next-to-skin stretch material. Comfort is now maximized by removing the in-seam seam for all-day riding happiness. New low-profile micro-cuffs at the ankle increase comfort and the high contrast stitching add a technical look. Whatever conditions you ride in, the Aggressor Series ensures you’ll be comfortable and dry ride-after-ride.
Low-profile ankle micro-cuffs enhance comfort and increase mobility
Patterning removes in-seam seam for ultimate riding comfort
Klim Aggressor Pants
I was preparing to ride to the Ohio Spyder Rally and temperatures were predicted to be cool, 40's and 50's. I ordered the Klim Aggressor Pants to wear under my riding gear as an extra layer. It proved to be all I hoped for. Very comfortable, fit was spot on, and it helped keep me warm, but still wicked away moisture and kept me dry, too. I rode over 1300 miles in five days, in cool, windy weather and stayed comfortable the whole time.
October 20, 2014
Great cold weather undergarment
Well made, keeps you warm, does what you buy it for
August 1, 2014
The ideal second skin
As I learned with the Aggressor briefs, the perfect base layer is the ideal companion. Makes long days on the bike WAY more comfortable. Their wicking properties in concert with that of an efficient mid layer (if needed) and a Goretex outer make for great comfort and ventilation.
Other than the fit being outstanding, there's little more to say about a product that simply and effectively facilitates comfort.
April 14, 2014
Have a functionality, fit, or otherwise product-specific question about the Klim Aggressor Pants? Ask it here!
If you have a customer service or shipping question, please direct it to our Customer Service department.
Daniel M: I'm about to go on a 1,000+ mile road trip and wanted some base layering since the weather is getting colder . . .Oct 2, 2014
S T: To try how these would work in early Spring and Late fall to keep warm under my Olympia Recon pants--will they keep me comfortable, not just temperature and moisture wicking-wise but to offset the "scratchy" feel of the pants on my skin.Sep 27, 2014
Sabrina S: I hate seams on my riding pants...painful! No seems and need another layer under my riding pants with wind liner for colder riding.Sep 19, 2014
EDUARDO S: I DO HAVE THE BADLAND JACKET. AND SO FAR I LIKE THE BRAND QUITE A LOTAug 11, 2014
Chris W: "Brand reputation and customer reviews on wicking capability- needed for two week road trip"Jul 20, 2014
Jashan S: Second set of the same pants and shirt (Klim Agressor) that i am getting. Great quality. Used it for a 7500km trip and washed and re-used multiple times. Good quality. Would recommend.Feb 6, 2014
David R asked:What about a siziing chart for these?Sep 24, 2014
Darrell R:Size Large for my 36" - 38" waist fits great not to tight just right. Size large for my 41" chest is almost snug/form fit and I would not want them any tighter as I don't want a compression fit. The sleeves are plenty long probably 34" or so. Washing is a short soak and gentle/delicate cycle and hang/air dry. The fit and quality is better than the under armor they replaced. Liked them so much I ordered more of them.Sep 24, 2014
Joseph B:They are very very close to the same sizing you wear in jeans. Helped on a recent warm rude and this did help provide some air movement on my armored pants, very comfortable. Sure I'll had a few more pairs. Sep 25, 2014
Ronald D:It's an either or thing. The Aggressor pant is simply a long version of the brief. I can tell you they are really comfortable. I wear these under my riding pants and a Klim Aggressor long sleeve top under my jacket. The top looks good enough to remove your jacket without having to then put on a shirt when you stop to eat. These seem to let the right amount of air through as you're riding.May 10, 2014
david b:I have used these with and without briefs ( not the Aggressor brief, the material has been cotton or merino wool ), equally comfortable. When I go on a long ride I wear the seamless merino wool short underpant at the same time rather than a brief since the latter tends to chafe. My reason for wearing both the shorts and pant is mainly for hygiene.May 10, 2014
Richard K:I own both but for me it is either or depending on how cold it is outside- the pant is just a longer version of the shorts. I suppose if you really wanted extra support you could double them up but they are basically a compression shorts like Under Armour. I never wear them at the same time. Hope that helps.... STEEP AND DEEP !!!May 9, 2014
Douglas K:I actually used the aggressor pants against the skin with KLIM tactical shorts over the top, were bit of a thermal barrier for the cooler ride I had today....... riding KTM in Mongolia and use the aggressors to stop some of the chaffing from the knee protectors and were very comfortable on the ride today....May 11, 2014
Dmitriy M:They will definitely help, but they don't seem to be designed to be wind resistant. I've ridden in 50-55F in perforated pants and these on, and have been fine some times, cold others. It really all depends on how fast you're going, how sweaty you are, and how much wind protection your bike offers.
I love these and wear them all the time, but I wouldn't recommend them if you're looking exclusively for wind protection. A rain membrane for your pants might be a better choice for that.Nov 7, 2014
Douglas K:folks, are designed as a base layer garment, I wear these under ventilated Dakar pants in the warmer months and late in the season under Traverse pants during the cooler times..... have had them out on 3 day hard rides on my KTM500 EXC Six Days, alot of standup and are great, no chaff or smell at the end of the day like cheaper synthetic base layers.Nov 9, 2014
Rick M asked:Will the Klim Agressor Pants worn under Klim Mojave Pants be all that effective in 85+ degree days to help keep you from ""cooking" ? My concern is that I may be just adding another layer and actually increase the effective heat factor. The same question would be equally valid for the Agressor Shirt worn under a Badlands jacket. Thanks. Appreciate all responses.Jun 22, 2014
Simon N:I ordered this pair of pants to tryout under my BMW Street Guard 3 pants. I live here in Singapore/Malaysia and the temperatures are consistently between 25-34C (77-93F). While this pair of pants is not as warm as many others, I do find the material to be warming. It works OK in the 25C temperatures but is definitely "cooking" on the 34C temperatures. I have much better success in high temperatures with Saloman Trail Running Tights.Jun 22, 2014