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New for 2015!
Klim Inferno Pants
  • Klim Inferno Pants - Black
  • Klim Inferno Pants - Grey

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Klim Inferno Pants

The Klim Inferno Pant is the perfect mid-layer for every ride and even the ride to the ride. Its Level 1 insulation performance adds just enough heat retention to keep the coldest stretches of trail at bay while allowing massive moisture movement and breathability when you heat up. Crisp fit and style.


  • Level 1 mid layer insulation performance
  • Ultra-comfortable durable fleece construction
  • Low-profile flat-lock stitching for maximum comfort and durability
  • Two convenient hand pockets and 2 back pockets


We highly recommend finding a cloth tape measure and taking the time to take these measurements.  Klim sizes will not necessarily correlate with fitment in other brands.

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.

Click here to see the full Klim Size Chart
Product Style RevZilla Item # Manufacturer Product # Availability
Black / SM 1013537 3355004120000 In Stock: Usually ships in 1-2 business days
Black / MD 1013538 3355004130000 In Stock: Ships within 24 hours
Black / LG 1013540 3355004140000 In Stock: Ships within 24 hours
Black / XL 1013542 3355004150000 In Stock: Ships within 24 hours
Black / 2XL 1013544 3355004160000 In Stock: Ships within 24 hours
Black / 3XL 1013546 3355004170000 In Stock: Usually ships in 1-2 business days
Grey / MD 1013539 3355004130600 In Stock: Usually ships in 1-2 business days
Grey / LG 1013541 3355004140600 In Stock: Usually ships in 1-2 business days
Grey / XL 1013543 3355004150600 In Stock: Usually ships in 1-2 business days
Grey / 2XL 1013545 3355004160600 In Stock: Usually ships in 1-2 business days


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.


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.
Klim Inferno Pants 4.6 5 5 5
Klim as Usual I've yet to purchase anything from Klim that I wasn't happy with. Purchased these for my Dad for Christmas. They fit well and he says they work great for riding underneath Klim Bibs. RevZilla had the listed price plus cheap, fast shipping. Got them in about 2 days during the busy Christmas shipping time frame. December 29, 2014
The name "Inferno" is appropriate Pretty much everything I wear for riding now is KLIM. Their quality, features, and durability won me over years ago. These pants are a perfect cold weather mid-layer solution. Used with a KLIM base layer, these build an excellent foundation for exploiting the Goretex outer (Badlands). They're comfortable for walking as well as riding, don't bind or catch, and are compliant with ventilation. Worn with KLIM Aggressor base and the matching Inferno jacket finds this system suitably warm down into the 30's for hours. They fall one star short with me as I did have to cut and hem their length as they were extraordinarily long. Not so big a deal when considering the manufacturer has such a wide range of bodies to fit. The cutting and hemming was simple. Length aside, KLIM never disappoints in fit and comfort making these the finest mid layer pants I've worn. April 14, 2014
Rebuttal I purchased the Inferno jacket and Inferno pants as liners for the Badlands jacket and pants. I'm 5'11" 220lbs and wear 38inch waist jeans. I ordered the XL jacket and, based on a review, the XXL pants. The XL jacket fit perfectly and looks great. I’ve been wearing it everyday for the last 2 weeks. My wife asked me to take it off for a day and she’d wash it. It’s more jacket than liner and you are going to be glad you bought one. I purchase the XXL pants because some dude in another review told me too. That dude forgot to mention that the pants are huge and you are going to look like a 12 year old wearing your fathers sweats. But still, he had a point. You could wear them over your jeans. You could probably wear them over 4 pairs of jeans, each pair increasing in size slightly until finally you pull your giant XXL Inferno pants over them. At 5’11’, the legs were long enough to curve around my ankle and cover my feet. I thought about sewing the legs shut and turning these bad boys into footsie pajamas. Instead, I ordered the size I actually wear which is an XL. These actually fit slightly snug but were still comfortable. The fit nicely within the riding pants without bunching up with massive amounts of excess material that make it look like you had an accident in your shorts. The only problem is that they have huge WWF size plastic buckles on each side so, theoretically, you could adjust the size. These large buckles dug into my blubber and cause serious discomfort. I sat at work in these pants and started to get mad for no reason until I realized it was these cod plucking buckles creating bed sores on my waist. Since I was maxing them out already, the adjustments were irrelevant, so I just cut them off with a sharp pair of scissors and PROBLEM SOLVED, PANTS GOOD. If you wear the pants and the jacket together to town, you will feel special and look good. My wife says it’s some borderline Guido sweat suit look but I told her to forgetaboutit. March 9, 2012
Great base to mid layer. Extend your pants riding season. I purchased these to be used as a thermal mid layer between street clothes and a motorcycle riding outer layer. These run slightly tight so I would recommend going two sizes up if you intend to wear them over another pair of pants. I have a 38 in waist and am wearing an XXL in these to fit over my jeans. The material in the pant stretches so this size fits me well as a base layer also. The material is a high tech fabric that is thin enough to not bulk, but insulating and breathable enough to make a big difference. January 9, 2012
Great light mid layer These pants are well made and fill the role very well. I'm 5'8" 170 lbs and wear a 32 jean but got these in 34 and they feel just right over thermo underwear. Very soft but smooth fablic should hold up well under outer layer. They fit fine under size 34 Traverse pants. October 25, 2011
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Klim Inferno Pants
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RevZilla Store asked: Why did you choose this?
Doug A: because there Klim Nov 12, 2015