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The MountainWarmth Thermal Pant captures the effortless balance of alpine performance and everyday winter comfort. Built with a weather-resistant technical shell and lined with plush 280g brushed microfleece, it delivers dependable warmth down to -10°C in a clean, tailored silhouette with zero excess bulk.
True to size with 4-way stretch. If you prefer a looser, relaxed fit, order one size up.
| Size | US Size | Waist (in) | Hip (in) | Inseam (in) |
|---|---|---|---|---|
| XS | 0 - 2 | 24 - 26" | 34 - 36" | 29.5" |
| S | 4 - 6 | 26 - 28" | 36 - 38" | 30.0" |
| M | 8 - 10 | 28 - 30" | 38 - 40" | 30.5" |
| L | 12 - 14 | 31 - 33" | 41 - 43" | 31.0" |
| XL | 16 - 18 | 34 - 37" | 44 - 47" | 31.5" |
| 2XL | 20 - 22 | 38 - 41" | 48 - 51" | 31.5" |
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Plush Fleece
2-Pack Set
Built to replace bulky winter layers from morning commute to mountain weekend.
Blocks bitter wind chill on city streets
Warmth down to 20°F without bulky thermals
Comfort for outdoor winter travel
Breathable lining never overheats indoors
Real wearers on why MountainWarmth replaced their bulky winter base layers.
“Finally, warm winter pants that don’t make me look like the Michelin Man on my way to work.”
“Usually my legs go numb in 10 mins outside. Walked 45 mins in a blizzard, didn’t feel a thing.”
“My biggest fear was sweating once inside heated shops. The fleece breathes—wore them 9 hours straight.”
Honest answers to help you choose the right pair for your winter.
No. Unlike non-breathable ski pants or heavy nylon windbreakers, MountainWarmth pants use a micro-porous thermal fleece lining that insulates without trapping moisture. It retains your natural body heat outdoors, but breathes freely the moment you walk into a heated cafe, office, or car. You stay comfortably warm, never clammy.
They feature a tailored straight-leg cut with 4-way stretch fabric and a comfort-stretch waistband with an internal drawstring. If you have athletic thighs or fall between two sizes, we recommend sizing up for a relaxed fit, or staying true to size for a sleek, tailored look. If you need a different size, our US exchanges are completely free.
Zero swish. The exterior is crafted from a soft, matte-finish technical stretch twill—not crinkly nylon or loud waterproof shell fabric. From the outside, they look and drape like premium everyday trousers or tailored chinos, making them completely quiet and appropriate for work and casual wear.
The exterior is treated with a durable water-repellent (DWR) finish and woven tightly to create a physical barrier against sub-zero wind chills. Light rain, snow flurry, and slush bead right off instead of soaking through, while the thermal fleece interior traps radiant warmth down to 14°F (-10°C).
Machine wash cold on a gentle cycle with like colors, then line dry or tumble dry on low. Our thermal microfleece is anti-pill treated and pre-shrunk, meaning the interior remains plush, ultra-soft, and true-to-fit even after dozens of washes. No special dry cleaning required.
Every pair comes with our 30-Day Cold Weather Wear Test. Take them outside on your coldest morning walk or commute. If you're not 100% satisfied with the warmth, fit, or comfort, simply reach out to our team for a fast exchange or a complete, hassle-free refund. We provide a pre-paid US return label.
