You can't make the day any cooler, but you can wear the women's REI Co-op Swiftland long-sleeve T-shirt—it cools you with microventilated SwiftTex™, a fabric so airy and light it's barely there.

t-shirts

If your everyday cap doubles as your sweat-stained running buddy, it might be time for the REI Co-op Swiftland running cap. The packable brim and quick-drying mesh are made for trail running.

ball-caps

If fast-moving trails under your feet are the best remedy for stressful days, pick up the pace in this everyday stretchy staple: the wicking, quick-drying REI Co-op Swiftland men's running joggers.

running-pants

Stand up to any rainy day run in the men's REI Co-op Swiftland Running Pants–with wind- and water-resistant fabric where you need protection most and 4-way stretch placed for comfort.

running-pants

If you like running long trails on warm days, you'll love the men's REI Co-op Swiftland T-shirt—it's made of microventilated SwiftTex™, a fabric so airy and cool it's barely heavier than the breeze.

running-shirts

Forget the heat and focus on the fun. The women's REI Co-op Swiftland short-sleeve T-shirt is made with microventilated SwiftTex™ fabric that's so airy and cool you won't even notice it's there.

t-shirts

You can't outrun heat, but you can run cool in the women's REI Co-op Swiftland short-sleeve T-shirt. It's made with microventilated SwiftTex™, a fabric so light and airy you barely know it's there.

t-shirts

Break a sweat and keep your cool. The women's REI Co-op Swiftland tank top is made with new microventilated SwitftTex™ fabric that's so light and airy it's like wearing nothing at all.

tank-tops

Power up, run far. Strong and stretchy, the men's REI Co-op Swiftland running tights hold your phone and anti-bonk energy snacks in compression pockets that won't hinder your stride

running-tights

Run through shoulder season with whisper-light core warmth that's just right for the temps—the men's REI Co-op Swiftland trail run vest sheds drizzle and blocks wind without weighing you down.

running-vests

Don't keep the trail waiting—head out now in the women's REI Co-op Swiftland training shorts. They're strong, stretchy and keep you supplied with plenty of pockets without weighing you down.

running-shorts

Your key to happiness on long runs, the cool, supportive women's REI Co-op Swiftland training shorts have plenty of pockets to keep you supplied without crimping your stride.

running-shorts

Every trail run is different, but some things don't change: Runner's high is higher out there in the layerable and light REI Co-op Swiftland Unlined 7 in. running shorts for men.

running-shorts

With a lightweight and water-repellent construction, the Chubbies Swim Gym 5.5 in. men's hybrid board shorts are just as ready for impromptu dips in alpine lakes as daily sweat sessions at the gym.

board-shorts