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AFO-Vent SS Tee

Regular price $66 Sale price $46
Unit price  per 

AFO-Vent SS Tee

W's AFO-Vent SS Tee

Heads up, this gear will ship in 3-5 weeks. Learn more about pre-orders.


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run everywhere guarantee
free shipping over $50
free 60 day exchanges
Slim fit, Size Chart Gabby is 5'8" and wears size S

Hit the trail in the AFO-Vent Tee — this lightweight, 4-way stretch tech top is made from a micro-perforated, abrasion resistant fabric for extra-breathable, durable running comfort. Raglan sleeves strategically remove seams from the top of the shoulder to optimally accommodate hydration vests or packs.

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Macro stretch, micro perf

Lightweight, structured 4-way stretch fabric with micro-perforations provides breathable, moisture-wicking + fast drying comfort

Pack Compatible

Raglan design removes seems from the shoulders while the AFO-Vent fabric stays put + won’t pill when worn under a vest or pack

Stay seen

Reflective logo on the front chest + “watermark” reflectivity on back increase visibility in low light



Lightweight yet tough
AFO-Vent is a durable, 4-way stretch nylon fabric that is abrasion resistant, retains its shape, resists odors, wicks moisture + dries quickly

Perforated venting
Micro-perforations enhance breathability

Raglan sleeve design, pack compatible
Strategically removes seams from the top of the shoulder for optimal comfort with a hydration vest or pack

Unhindered movement
Underarm gusset provides fuller range of motion

Minimal trims
Low-profile, mini-binding collar for smooth, lightweight comfort

Smooth finish
Bonded sleeve hems + hemline provide an anti-chafe, clean finish

Hang it up
An ultralight nylon hang loop is integrated into the back neck for easy hanging

Stay seen
Janji signature reflective logo on front chest + “watermark” reflectivity on back increase visibility in low light

materials + specs

80% nylon, 20% elastane

Garment made in Vietnam
72g / 2.5oz (W’s Small)

Fabric Callout


Lightweight yet tough trail gear made from 4-way stretch fabric with micro-perforations for extra-breathable running comfort.


care instructions

Wash cold with like colors

Hang dry (they dry quickly!) or tumble dry low

Heads up — AFO-Vent may feel stiffer than you're used to

This fabric is more structured so that it won't ride up or pill from lots of use. Expect it to soften as you sweat throughout the run.


The first rule to making something sustainable? Build it to last. This top is built to endure the rigors of serious wear. We made it out of our AFO-Vent fabric — a durable nylon that is lightweight yet tough, abrasion resistant, odor resistant and will retain its shape. All trims are minimal and low-profile to reduce weight, fuss and stress points.

Our AFO-Vent fabric is also bluesign® certified meaning it is free from harmful chemicals and is fabricated in a way that meets a high environmental standard.

Learn more about our sustainable initiatives here.


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Customer Reviews

Based on 5 reviews
Joanne Underwood
W's AFO-Vent SS Tee

Very comfortable, no chafing after long runs.

Vanessa Durant
Great technical top

My only gripe with Janji is that they make the shoulders on women’s shirts so narrow. I’m 5’8 and very lanky with broader shoulders and the tops fit weird. I wish you guys could extend the width just a smidge. <3

Rosa M
Lightweight & Breathable

At first, I wasn't sure about the sleeve length. But after running around - I didn't notice that it was slightly longer than most of my shirts. I wore this on a pretty warm day and it was great! Light, breathable, comfortable, and really feels like it can hold up! Also...the Jasper color is so nice!

Corinne W
Not My New Favorite

As a heavy sweater I’m always looking for different lightweight fabric options that wick away sweat and dry quickly. This shirt just didn’t do it for me. From the moment I put it on I got a little worried. I felt like I was wearing a tarp, but wanted to give it a fair shot. As I got more and more sweaty it started clinging to my skin which I wasn’t a huge fan of. 3 stars since I love the dusk color and the cut and sleeves on this shirt are very flattering. I will say that I thought the shorts in this same fabric performed very well and I was impressed by those. I will probably use this shirt on shorter easy runs in mild weather mid-40s-60s.

Shelly Herman
Comfy, but terrible for hot humid weather.

I wanted to love these shirts. They fit and feel great. However, they are horrible at wicking sweat. I live in Florida so even my early morning runs are hot and humid. I was excited to try a new shirt I thought would feel light and cool, unfortunately this isn’t it. My sweat just saturates the shirt, making it wet and heavy. I’m sure they’ll be great in fall and winter though.