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Wool Warmth for Rugged Days and Chilly Nights
Simms M's Midstream Insulated Pant – Natural Insulation Meets Technical Performance
From damp river mornings to crisp mountain nights, the Simms M’s Midstream Insulated Pant keeps you warm, dry, and moving freely. Featuring Lavalan® Sport 40g wool insulation, these pants harness the natural temperature regulation, moisture control, and odor resistance of wool in a lightweight, travel-ready design.
Built with an abrasion-resistant nylon shell treated with a C0 DWR finish, the Midstream Insulated Pant sheds light moisture and stands up to demanding environments. Reinforced overlays on the knees and seat provide extra protection, while articulated knees and a gusseted design deliver unrestricted mobility for long days in the field or around camp.
Key Features:
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Lavalan® Sport wool insulation – 40g warmth with exceptional breathability and odor resistance
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Weather protection – Durable nylon shell with C0 DWR finish repels light moisture
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Reinforced zones – Overlays on knees and seat for added durability
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Secure, adjustable fit – Integrated belt with quick-release buckle and elastic waistband
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Functional pockets – Two front drop-in hand pockets and two rear drop-in pockets
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Freedom to move – Articulated knees and gusset construction for comfort in motion
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Convenient zip fly for easy wear
Style No.: 14237
Size Chart:
| Men’s Size | Waist* | Inseam** |
|---|---|---|
| S | 31" – 33" | 30" |
| M | 33" – 35" | 31" |
| L | 35" – 37" | 32" |
| XL | 38" – 41" | 33" |
| 2XL | 42" – 44" | 34" |
| 3XL | 45" – 47" | 34" |
* Measure around natural waist.
** Inseam measured from crotch to ankle.
Summary:
The Simms Midstream Insulated Pant combines premium wool warmth with rugged nylon durability—ideal for cold-weather fishing, camping, and year-round adventures.