M's Zephyrunner Wind Shell

hyperlight windbreaker, back venting, ultra packable
Color Midnight
Size
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Regular fit: Athletic fit that provides enough room for range of motion and air circulation – just right for comfortable movement
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The ultra-packable Zephyrunner is designed to provide indispensable protection for moving quickly across varying and fast-changing conditions. This lightweight, water-repellent jacket balances protection, breathability, and versatility in a nearly weightless layer that stops wind without preventing heat release during high-output efforts.

Features

Strategic breathability
Back panel venting keeps you comfortable while maintaining wind protection

Better than zero
The Zephyrunner strikes a perfect balance of wind-breaking breathability with a CFM rating of 16 engineered specifically for running + high-activity output activity

Multi-condition preparedness
Hyperlight, durable nylon shell is water-resistant and wind-blocking for whatever the trail may bring

Ready for anything
Stows into chest pocket for easy packability

Secure fit
Bungee hem and hood toggle allow for an adjustable fit on the fly, reducing exposure in windy conditions

Keep it separated
2 zip hand pockets and a zip chest pocket stash small essentials close at hand

Visibility
Signature reflective logos for improved visibility in low light

Materials + Specs

Zephyr
100% nylon with PFC-free C0-DWR (durable water repellency)

Weight
124g / 4.4oz (M’s Medium)

Garment made in Vietnam

CFM is the rating that measures how windproof a fabric is - 0 is totally windproof. With a CFM of 16, the Zephyrunner cuts most wind while staying highly breathable - ideal for running performance.

Select your size:
Gear added to cart:
M's Zephyrunner Wind Shell
M's Zephyrunner Wind Shell
Qty: 1
$156
Checkout
  • 5 stars: 39 (85%)
  • 4 stars: 3 (7%)
  • 3 stars: 2 (4%)
  • 2 stars: 1 (2%)
  • 1 star: 1 (2%)
K
Korey
Product fit:
Runs small
Runs large
Usual Size: M
Size Purchased: M
Height: 5'7" to 5'9"
Weight: 150-170 lbs

M's Zephyrunner Wind Shell

J
Jake

Awesome wind shell, great material

K
Kyagnik
Product fit:
Runs small
Runs large
Usual Size: M
Size Purchased: M
Height: 5'10
Great windbreaker in cool/cold weather where it’s

Great windbreaker in cool/cold weather where it’s windy or slightly rainy / drizzly. The materials are great too - environmentally friendly rainproofing, YKK zippers (this is not advertised or on the product page but was a pleasant surprise), and it just looks really good (form fitting medium size for me). Really like the blue.

L
Luke
Product fit:
Runs small
Runs large
Usual Size: M
Size Purchased: M
Height: 6'0" to 6'2"
Weight: 170-190 lbs
Super Lightweight

I searched for quite a while to find the ideal windbreaker, and this is the closest I’ve come. The jacket features two zippered hand pockets, which are rare in this weight class and a great bonus. I’m 6’1”, 180 lbs, and wearing a size medium—no need to size up or down. The fabric has a bit of stretch, which is appreciated when layering underneath. It breathes well and doesn’t trap sweat, and the breathable back panels do a good job of letting moisture escape. I haven’t tested it in light rain yet, but I would prefer some type of DWR finish.

P
Pedro
Product fit:
Runs small
Runs large
Usual Size: M
Size Purchased: M
Height: 5'7" to 5'9"
Weight: 170-190 lbs

M's Zephyrunner Wind Shell

J
Jacob
Product fit:
Runs small
Runs large
Usual Size: M
Size Purchased: M
Height: 6'0" to 6'2"
Weight: 150-170 lbs

M's Zephyrunner Wind Shell

C
Chris
Product fit:
Runs small
Runs large
Usual Size: M
Size Purchased: M
Height: 6'0" to 6'2"
Weight: 150-170 lbs
Zephyrunner Wind Shell 5 Stars

The best wind shell I’ve ever run in. It arrived just in time for the change in seasons. Couldn’t be happier with the quality and performance!

M
Mark
Product fit:
Runs small
Runs large
Usual Size: XL
Size Purchased: XL
Height: 5'7" to 5'9"
Weight: 190-210 lbs
My favorite light weight jacket

I now own 3 different colors of this jacket. It’s so perfect for the Pacific Northwest weather. It’s light and warm enough for my runs. I love this jacket.

R
Robert
Wear it for: Running
Product Fit: Spot-on
Height: 5'10" to 6'0"
Usual Size: M
Size Purchased: M
A great runner

Super light weight and you can barely notice it on. Nice weather/wind protection and a chest pocket that can hold my cell.

D
D.B.
Wear it for: Running
Product Fit: Spot-on
Height: 6'0" to 6'2"
Usual Size: L
Size Purchased: L
Nice

Lightweight, no distracting noises while moving, blocks wind and no overheating.

R
Ryan
Wear it for: Running
Product Fit: Spot-on
Height: 5'10" to 6'0"
Usual Size: L
Size Purchased: L

M's Zephyrunner Wind Shell

N
Nathan
Wear it for: Running
Product Fit: Spot-on
Height: 6'0" to 6'2"
Usual Size: M
Size Purchased: M
excellent, versatile, windbreaker

one of my favorite and most used pieces of gear, from fall to spring use it from 5F-55F. Blocks all but the strongest wind and keeps you warm in winter. Use the grangers 2-1 wash to keep it water resistant. I have the bright red Nova color to be seen on the road. Please Janji put out more bright primary colors!

D
David
Wear it for: Running, Cycling
Product Fit: Spot-on
Height: 6'0" to 6'2"
Usual Size: M
Size Purchased: M
Early AM Jacket to Start out Warm

Has been a great addition to my early am runs. 5:30 am is always cold and this give a nice layer to cut the chill until I warm up. On colder days the hood is a plus. Lots of pockets to hold a couple bucks for espresso and my hotel key. Grat buy. Very happy

N
N.
Wear it for: Running
Product Fit: Spot-on
Height: 6'0" to 6'2"
Usual Size: M
Size Purchased: M
It's a nice jacket but way too pricey

Does what it should , very light , amd very packable. But 138 dollars is way too expensive. If it was around the 70 dollar range I'd of Givin it 5 stars

J
Jay
Wear it for: Running
Product Fit: Spot-on
Height: 5'7" to 5'9"
Usual Size: S
Size Purchased: S
Light & fits right!

Love it!

J
Joseph
Wear it for: Running
Product Fit: Spot-on
Height: 5'7" to 5'9"
Usual Size: L
Size Purchased: L
Great fit

Running jacket feels great! I do not over sweat in the jacket and stay very comfortable during runs.

A
Anonymous
Wear it for: Running
Product Fit: Spot-on
Height: 5'10" to 6'0"
Usual Size: M
Size Purchased: M
Surprisingly warm windbreaker

Jacket fits great with decent body length, the pockets and hood do what they need to do. Overall this generally hits the spot.

For the weight, this jacket is surprisingly warm. For running this jacket might be a little too much for me. I also found that as a heavy sweater that it tended to absorb a lot of moisture, however it does dry quickly which is a positive.

S
Steve
Wear it for: Running, Hiking, Camping, Climbing, Cycling, Mountain Biking, Everyday wear
Product Fit: Spot-on
Height: 5'10" to 6'0"
Usual Size: L
Size Purchased: L
Perfect ultralight, breathable jacket

This jacket is perfect for cutting the chill on windy or drizzly days. Its ultralight design makes it incredibly convenient—you can easily take it off once warmed up, ball it up in your hand, or stash it super compact in the zippered chest pocket. It feels even lighter than the Patagonia Houdini, but it’s not sheer and still provides substantial wind blocking and warmth. It’s also a great jacket to wear casually. I keep one in my truck just in case I need an extra layer when daylight turns to dusk. I love it so much that I’ve bought it in four different colors!

L
Lori
Wear it for: Running, Hiking, Camping, Climbing, Mountain Biking
Product Fit: Spot-on
Height: 6'0" to 6'2"
Usual Size: M
Size Purchased: M
Perfect

Purchased this for my son for Christmas. He absolutely loved it and will be wearing it as a mid layer.

A
Alex
Wear it for: Running, Cycling, Everyday wear
Product Fit: Spot-on
Height: 5'10" to 6'0"
Usual Size: L
Size Purchased: L
Zephyrunner Wind Shell.

Great shell! I use it on an 8 mile (bike) commute with temps around 46 degrees in the morning and on runs. Layered up. Lightweight. I like how they designed the hood strap/cinch from the back. Highly recommend. Looks good wearing it casually as well.

J
JJ
Wear it for: Running
Product Fit: Runs large
Height: 6'3" or taller
Usual Size: L
Size Purchased: L
Durability issues after 2 months

Nice jacket — was enjoying it until I noticed some severe deterioration of the materials after only a few months. This might be on me for machine washing/drying, but have had similar jackets and have used those cleaning methods without problems.

C
Colin
Wear it for: Running, Hiking, Camping, Cycling, Mountain Biking, Everyday wear
Product Fit: Spot-on
Height: 6'3" or taller
Usual Size: XXL
Size Purchased: XXL

M's Zephyrunner Wind Shell