REI Co-op Magma 850 Down Jacket - Men's
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Boasting toasty, ultralight insulation, the men's REI Magma 850 down jacket offers easy movement and just-right warmth for backpacking, hiking and travel.
Shop newer versionKey Details
- Goose down boasts durable water repellent (DWR) treatment to help keep you dry and warm
- 850-fill goose down insulation provides a high warmth-to-weight ratio and compacts so easily you can pack the jacket into its own left-hand pocket for storage
- Variable baffles map insulation to the body, providing warmth where it's needed and reduced bulk where it's not
- Pertex® ripstop shell is ultralight and durable
- Shoulder seams are rolled forward to reduce bulk and prevent chafing under pack straps
- Tightly quilted underarm gussets reduce bulk, improve range of motion, and prevent jacket hiking at the waist
- Elastic cuffs and drawcord hem help seal in warmth
- Zip hand pockets are positioned to be compatible with a pack's hip belt
- REI Co-op brand is certified to The Climate Label; we actively fund efforts to reduce carbon emissions across our business and support climate projects around the world
Imported.
View the REI Co-op Magma Product LineView all REI Co-op Men's Down JacketsBest Use | Backpacking |
---|---|
Fabric | Pertex ripstop nylon shell |
Insulated | Yes |
Insulation Type | Down |
Insulation | 850-fill goose down |
Water-Resistant Down | Yes |
Back Length | Waist-length |
Back Length (in.) | 28.75 |
Gender | Men's |
Weight | 10.8 ounces |
Sustainability | Down certified to the Responsible Down Standard (RDS) From a Climate Label Certified brand |
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 | 32 | 32.5 | 33 | 33.5 | 34 | 34.75 | 35.5 | |||||||||||||||||
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. Size chart values represent body measurements, not garment measurements.
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.
Inseam is measured to the floor.
Better gear is built together
From feedback to field testing, all of our gear is dialed-in by REI Co-op members. Their adventures informed every stitch and detail—making for better, longer-lasting gear.

