From morning’s first frosty steps to midday sweat and exhilaration, the men’s REI Co-op lightweight base layer bottoms wick and breathe to keep you comfortable all the way.
Features
- Made of a soft polyester blend that wicks sweat and dries fast to keep you warm in winter and cool in summer
- Spandex in the fabric gives these bottoms 4-way stretch
- Flatseam construction and low-profile waistband and crotch gusset keep you comfortable as you move
- UPF 50+ sun protection
- Fly opening
- Ankle-length inseam
- Sem-fitted
Imported.
Technical Specs
| Best Use |
Multisport |
|---|---|
| Fabric |
92% polyester/8% spandex |
| Sun-Protective Fabric |
Yes |
| UPF Rating |
50 |
| Moisture Wicking |
Yes |
| Quick Drying |
Yes |
| Fly Opening |
Yes |
| Underwear Weight |
Lightweight |
| Inseam (in.) |
27 inches |
| Gender |
Men’s |
| Sustainability |
Fair Trade Certified™ factory |
Size Chart
| XS | S | M | L | XL | XXL | XXXL | 24 IN Waist | 26 IN Waist | 28 IN Waist | 30 IN Waist | 31 IN Waist | 32 IN Waist | 33 IN Waist | 34 IN Waist | 35 IN Waist | 36 IN Waist | 38 IN Waist | 40 IN Waist | 42 IN Waist | 44 IN Waist | 46 IN Waist | 48 IN Waist | 50 IN Waist | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Chest | 35 | 36 – 38 | 39 – 41 | 42 – 45 | 46 – 49 | 50 – 53 | 54 – 57 | |||||||||||||||||
| Sleeve Length | 33 | 33.5 | 34 | 34.5 | 35 | 35.75 | 36.5 | |||||||||||||||||
| Waist | 27.5 | 28 – 30 | 32 – 34 | 36 – 38 | 40 – 42 | 44 – 46 | 48 – 50 | 24 | 26 | 28 | 30 | 31 | 32 | 33 | 34 | 35 | 36 | 38 | 40 | 42 | 44 | 46 | 48 | 50 |
| Hip | 33.5 | 34.5 – 36.5 | 37.5 – 39.5 | 41 – 43 | 44 – 46.5 | 47.5 – 50.5 | 51.5 – 54.5 | 32 | 33.5 | 34.5 | 36.5 | 37 | 37.5 | 38.5 | 39.5 | 40.25 | 41 | 43 | 44 | 46.5 | 47.5 | 50.5 | 52.5 | 54.5 |
| Inseam | 32 | 32 | 32 | 32 | 32 | 32 | 32 | 32 | 32 | 32 | 32 | 32 | 32 | 32 | 32 | 32 | 32 | 32 | 32 | 32 | 32 | 32 | 32 | 32 |
Sizing Notes
Measurements are stated in inches unless otherwise indicated.
SHORT: Some pants are available in short sizes, which generally means an inseam that is 2.5 inches shorter than regular sizes.
TALL: Some pants, shirts, jackets and parkas are available in tall sizes, which generally means an inseam that is 3 inches longer and a rise that is 1 inch longer, a shirt or jacket body that is 2 inches longer, a parka body that is 2.5 inches longer and sleeves that are 2.5 inches longer than regular sizes.
Capri or cropped pants have an intentionally shorter inseam—reference the technical specs instead of this chart.

























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