70% off
Men's GORE-TEX® Mammoth Down Vest (Fall 2025)
$150.00
$500.00
SEZI GUIDE
Hiking Pants, Trekking Pants & Soft Shell Bottoms
| US Size | Waist (in) | Hip (in) | Inseam (in) | Thigh (in) |
|---|---|---|---|---|
| S | 28–30 | 35–37 | 30–32 | 21–22 |
| M | 31–33 | 38–40 | 32 | 22–23 |
| L | 34–36 | 41–43 | 32–34 | 23–24 |
| XL | 37–40 | 44–46 | 32 | 24–25 |
| XXL | 41–44 | 47–49 | 32 | 25–26 |
Rain Jackets, Hard Shells & Insulated Parkas
| US Size | Chest (in) | Waist (in) | Hip (in) | Sleeve Length (in) |
|---|---|---|---|---|
| S | 35–37 | 28–30 | 35–37 | 32–33 |
| M | 38–40 | 31–33 | 38–40 | 33–34 |
| L | 41–43 | 34–36 | 41–43 | 34–35 |
| XL | 44–46 | 37–40 | 44–46 | 35–36 |
| XXL | 47–50 | 41–44 | 47–50 | 36–37 |
Base Layers, Fleece Mid Layers & Hiking Tops
| US Size | Chest (in) | Waist (in) | Hip (in) | Body Length (in) |
|---|---|---|---|---|
| S | 35–37 | 28–30 | 35–37 | 27–28 |
| M | 38–40 | 31–33 | 38–40 | 28–29 |
| L | 41–43 | 34–36 | 41–43 | 29–30 |
| XL | 44–46 | 37–40 | 44–46 | 30–31 |
| XXL | 47–50 | 41–44 | 47–50 | 31–32 |
* All measurements are in inches. Measure over a lightweight base layer for accuracy.
* If you're between sizes, size up — you'll want room to layer underneath on the trail.
* Actual fit may vary slightly by style, fabric stretch, and down/insulation loft.
Meet the vest version of our iconic Mammoth GORE-TEX® Parka. Packed with powerfully lightweight 700-fill down and built with fully waterproof GORE-TEX fabric, this reimagined vest is a legend through and through. On cold city nights, the lightweight 700-fill-power down body delivers massive core warmth and style for days. Stuff your hands into the oversized handwarmer pockets, stash your gear in this winter vest's internal pockets, and venture forth.