Alpinestars Monteira Drystar XF Pants ::

Alpinestars Monteira Drystar XF Pants

The multi-season Monteira Drystar®XF pants are engineered to deliver optimal protection, weather performance and comfort, and utilize Alpinestars new laminated 2L Drystar®XF technical waterproof and highly breathable membrane, a detachable thermal liner, and large direct ventilation panels on the thigh for effective all-weather performance. Featuring a 450D poly-fabric construction with strategically positioned 600D reinforcements for enhanced durability, these pants are equipped with Nucleon Flex Pro knee armor for effective protection against impacts. The pants are designed with a tailored, ergonomic fit to accommodate all riding movements.

1. The laminated technical Drystar®XF membrane provides superior breathability for the pants and 100% waterproof performance. The membrane is easily packable and fast drying.

2. DWR (Durable Water Repellent) treatment for additional wet-weather performance.

3. Wide direct ventilation ports with ‘quick hand’ activation design for effective climate control on the go in any conditions.

4. The pants incorporate large, wide direct ventilation panels on the thighs with a ‘quick hand’ activation design for effective climate control on the go, as well as extensive stretch inserts for optimum freedom of movement and an enhanced fit.

5. Magnetic buckle closure for quick and secure closure, with adjustability.

  • Comprehensive stretch inserts for optimum freedom of movement and an enhanced fit
  • Detachable 80g thermal liner allows the pants to be configured to the conditions
  • Two cargo pockets and two waterproof pockets for safe and secure storage of valuables
  • Direct ventilation panel can be operated with one hand for fast and effective climate control on the go
  • Designed with a tailored, ergonomic fit to accommodate all riding movements
  • Waist, knee, and calf volume adjusters for an optimized fit
  • Reflective detailing on the lower leg
  • 450D laminated hard shell construction for enhanced durability
  • 600D Dobby woven reinforcements for additional durability in key areas

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Sizing Information

The pants are sold in ordinary US Alpha sizes. To help you get the right size, we’ve developed a chart which shows Alpinestars “official” estimate of size along side our own size estimates based upon measurements of the actual products. Alpinestars size chart information was pulled from their own website and from sales literature supplied to their dealers (sizing info is new for 2021 season and will differ from older size charts on our site). Generally speaking, we find the pants to run close to their size estimates in smaller sizes, but in the larger size ranges, the pants run increasingly smaller than what Alpinestar’s information indicates.

To find a fit, we advise you to use a tape to measure your waist and choose a size from the chart using our recommendations. You’ll want to measure yourself up a bit higher on your waist than ordinary jeans because protective pants like this are a little higher waisted. Take the link below if you need advice on how to measure. Please note that we are listing a waist size range for each pant because the pants have adjustment tabs on the waist that allow you to snug them down if needed (but they do not get bigger).

With this particular pant, if you find yourself between sizes in the chart, I’d advise you to choose the larger. These pants have a thermal liner which makes them run a big more snug through the legs as well.

Alpha Size Alpinestars Waist
Size Estimate
Alpinestars Inseam
Size Estimate
Our Waist
Size Estimate
Our Inseam
Small 30-32.5 31 30-32 32
Medium 32.5-34.5 32 31-33 33
Large 34.5-37 33 32.5-34.5 33.5
XL 37-39 34 34-36 34
XXL 39-41 35 36-38 34.5
XXXL 41-43.5 35.5 38-40 35
XXXXL 43.5-45.5 36 40-42 35.5

Need help measuring? Get it here.

Our Two Cents

Alpinestars has a new Drystar®XF line this year, XF stands for Extra Flow. From the garments that we’ve looked at so far that is an appropriate name for the direction they have taken the line.

The Alpinestars Monteira Drystar®XF pants are a touring style pant that offers great ventilation and waterproofing.

The Monteira Drystar®XF Pants use Alpinestars proprietary waterproofing technology, Drystar®, along with a DWR treatment to help water bead up and roll off and it has the added luxury of large ventilation panels. There are large zips just above the knee. If you unzip these and undo the hook and loop at the side of the section, then the large resulting panel can be folded into itself and stored near the top of the panel section. There is a small magnet on the overlying strap that holds the flap up and exposes the direct to the body vent panel that hides behind it. So you have waterproofing, airflow, and there is also a removable thermal liner that should reach the top of your riding boots.

As touring pant, you would expect storage pockets on the Monteira Drystar XF. There are two waterproof cargo pockets at the hips and one zippered hand pocket on the right thigh near the waist.

The Monteira Drystar®XF pants have a zippered fly and an adjuster belt at the waist that has a neat magnetic closure. There is a pull tab on the “buckle” that you can pull with one hand and it comes unhooked easily. And since it’s magnetic just get it close and it will line up and close on it’s own! Best of all it is firmly in place when you pull side to side despite this ease of function. When we get items like this that have reinvented something that has been around for thousands of years like a belt we always test them out. Alpinestars has done this many times this year, the “lacing” system of the Alpinestars Turnstone Boot is the first one that comes to mind but they’re innovating in some very interesting ways and it is nice to see that come to market. This belt closure is suprisingly simple and easy to use but holds up under pretty intense side to side force, with just a simple pull popping it open when you actually want it open. There are also hook and loop adjusters just below the knee and zippered expansion gussets and another hook and loop adjuster at the cuff will help you get them over larger riding boots.

Most of the Monteira pant is 450D laminated construction with 600D overlays in the knees. Alpinestars has included Nucleon Flex Pro CE level 2 armor at the knees and hips. There are also reflective accents on the thigh area for improved nighttime visibility.

The Alpinestars Monteira Drystar®XF Pants will work well for adventure touring and commuter riders in warm to cold, rain or shine weather. The Drystar® waterproofing and large ventilation panels give this pant 3 season functionality, maybe 4 seasons depending on where you are. A great new product and an innovative option, the innovative buckle and ventilation panels are worth the price of admission on this one! :: Mike, 12/14/2022

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