REI Co-op Hyperaxis Fleece Pants - Men's

Color: Black
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Members get an estimated $10.00 (10%) back on this item.
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Tough on the outside, cozy on the inside, Polartec® Power Stretch® Pro™ fleece means the men's REI Co-op Hyperaxis fleece pants are super stretchy and warm for easy climbing, hiking and hanging out.


  • Polartec Power Stretch Pro provides warmth, wicks moisture and has 4-way stretch for a comfortable range of motion
  • Fleece is brushed on back for softness; smooth outer face makes layering easy
  • Elastic waistband with drawcord fine-tunes the fit
  • Crotch gusset improves range of motion
  • Zippered hand pockets keep trail essentials handy
  • Made using bluesign®-approved materials, which conserve resources and protect the health of the environment, workers and wearer (you!)


View the REI Co-op Hyperaxis Product LineView all REI Co-op Men's Fleece Pants

Technical Specs

Best Use



Polartec Power Stretch Pro fleece (50% polyester/40% nylon/10% LYCRA spandex; bluesign® approved)

Fleece Weight


Inseam (in.)

32 inches


13.1 ounces




Contains materials that meet the bluesign® criteria

From a Climate Neutral Certified brand

Pant Fit


Pant Leg Style


Size Chart

XSSMLXLXXLXXXL24 IN Waist26 IN Waist28 IN Waist30 IN Waist31 IN Waist32 IN Waist33 IN Waist34 IN Waist35 IN Waist36 IN Waist38 IN Waist40 IN Waist42 IN Waist44 IN Waist46 IN Waist48 IN Waist50 IN Waist
Chest3536 - 3839 - 4142 - 4546 - 4950 - 5354 - 57
Sleeve Length3333.53434.53535.7536.5
Waist27.528 - 3032 - 3436 - 3840 - 4244 - 4648 - 502426283031323334353638404244464850
Hip33.534.5 - 36.537.5 - 39.541 - 4344 - 46.547.5 - 50.551.5 - 54.53233.534.536.53737.538.539.540.2541434446.547.550.552.554.5

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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