REI Co-op  Active Briefs - Women's

Color: Mauve Shadow
please select a Size
Select size for delivery dates

Members get an estimated 10% back on this item as a part of your annual .

Members get an estimated 10% back on this item.
To buy,  sign in as an REI Co-op Member or join now.

Made to move, the moisture-wicking, quick-drying REI Co-op Active briefs for women are your ticket to comfy on and off the trail. Designed for people who like to move.


  • Briefs style features a higher rise and longer outseam than our Active Bikini and Active Hipster underwear
  • Stretchy polyester mesh is constructed with minimal seaming and trim details
  • Moisture-wicking and quick-drying after sweating or washing
  • Pairs with REI Co-op Active bralette (not included)
  • Machine wash warm; use only non-chlorine bleach, when needed; tumble dry low
  • REI is Climate Neutral Certified; as we work to actively reduce our footprint, we measure annual carbon emissions and purchase an equivalent amount of verified carbon credits


View all REI Co-op Women's Briefs

Technical Specs

Best Use


Underwear Style



86% polyester/14% spandex mesh

Moisture Wicking


Quick Drying





From a Climate Neutral Certified brand

Size Chart

Numerical Size000-24-68-1012-14161820-2224-2602468101214161820222426
Sleeve Length29.53030.53131.532.533.533.534.5303030.530.5313131.531.532.533.533.533.534.534.5

Sizing Notes

Measurements are stated in inches unless otherwise indicated. Some women's pants are available in petite and tall sizes. Typically petite sizes fit women 4'11" to 5'3". Regular sizes fit women 5'4" to 5'8". Tall sizes fit women 5'9" to 5'11".

PETITE: Generally, as compared to regular sizes, petite sizes are 2.5 inches shorter in inseam, 1 inch shorter in body length, 1.25 inches shorter in sleeve length and ¾ inch shorter in total rise.

TALL: tall sizes are 3 inches longer in inseam, 2 inches longer in body length, 2.5 inches longer in sleeve length and 1.25 inches longer in total rise.

Capri or cropped pants have an intentionally shorter inseam—reference the technical specs instead of this chart.

32 reviews with an average rating of 4.2 out of 5 stars

Loading Reviews...

Questions & Answers

Loading Questions...