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men'S tops

AFO Singlet

M's AFO Singlet

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run everywhere guarantee
free shipping over $50
free 60 day exchanges
Slim fit, Size Chart Aron is 5'11" and wears size MWilliam is 6'1" and wears size M

Nearly weightless, the AFO Singlet is a radically light, fast drying and high-performing tech top.

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Print Story - Under Cover

As part of our American Southwest Collection, this print was designed by Santa Fe-based multimedia artist and pro mountain trail runner Christian Gering. ​​A monochromatic, reflective version of the “Star Cover” print rotated on a 45º axis like stars shooting across the night sky. This design represents a connection across generations to ancestors who guide us, lighting our path.

Print Story - Star Cover

As part of our American Southwest Collection, this print was designed by Santa Fe-based multimedia artist and pro mountain trail runner Christian Gering. Proliferating a single star (represented by a four-pointed directional cross) into a sky pattern, this joyful composition symbolizes the never-ending fabric of time and represents a connection across generations to ancestors who guide us, lighting our path.

Print Story - Nocturne

As part of our Chennai Collection, this landscape print is designed by Chennai-based textile artist Kashmira Baheti and captures the nocturnal energy of the junglescape that surrounds her hometown. The ground texture is intended to reflect both earth and water, as Chennai's landscape can fluctuate dramatically between the two with the changing seasons.

Print Story - Spray Dye

The Spray Dye print capsule is inspired by the distinct differences of each waterway on this planet, and the greater interconnectivity they all share as a singular body.


Weightless feel
Ultra-light AFO stretch woven fabric for a barely-there-feeling shell

Cool and dry
Fast dry time, high breathability + excellent sweat wicking keeps the core cool

Comfortable drape
Wider racer back design enhances comfort by distributing the fabric drape across the shoulders

Smooth finish
Bonded armholes, neckline + hem ensure an anti-chafe fit and super clean finish

Signature detailing
Body wrapped sport seaming is topped off with ladder stitch detailing

Stay seen
Signature "watermark" blue reflectivity on lower back increases visibility in low light

materials + specs

88% recycled polyester, 12% elastane

57g / 2oz (M's Medium

Garment made in Vietnam

Fabric Callout


Ultra-light and fast drying, AFO is a stretch woven made from recycled polyester. We use it across our Singlets, Splits, Middle Shorts, and 2-In-1 Traverse Shorts for high-performance styles that feel lighter-than-air.


care instructions

Wash when needed on cold, delicate cycle with like colors

Tumble dry low or hang dry for best results and lifespan of the garment


Our AFO fabric is composed of 88% recycled polyester. We use high-grade recycled polyester made from 100% post-consumer recycled plastic like rPET (commonly found in single-use bottles and containers) to reduce the impact of our apparel without sacrificing on performance, durability or comfort.

AFO 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 38 reviews
I havnt received it yet

I havnt received it yet.
Should i have?

wolf b.
Wear it for: Running
Product Fit: Spot-on
Height: 5'4" to 5'6"
Usual Size: S
Size Purchased: S
Top notch

Janji fabric and construction quality continues to impress me with every purchase. Their singlets and shorts are THE BEST I’ve ever worn!
(and that’s in 40yrs of working out!!!)

Timothy N.
Wear it for: Running
Product Fit: Runs small
Height: 5'1" to 5'3"
Usual Size: S
Size Purchased: S
Bomb gear!

Loving these technical running clothes. Like another skin, so light.

Andy G.
Light and fun!

The Janji singlet is the best! Stuff in your suitcase and it’s always ready for a workout. Soft, comfortable. Love it!

Kurt S.
AFO Tank Top

Follow the size chart for a perfect fit. Love this shade of blue. Super light fabric. Also allows for stretching. Only negative thing I have to say is it holds onto moisture, but I perspire a lot in the humid Indiana Summer.

Impossibly light, breathes well, cut just right

I'm 5'9" 165 lbs and M fits me just right. I've done three long runs in this singlet and I am going to have to buy a couple more to get through the summer because I don't want to wear anything else.

Jesse C.
I bought a size up.

I’m not a runner by tradition. Just recently started getting into it. Typically I run small. But I find Janji clothing fits me better in a size medium. I absolutely love the quality and comfort of Janji gear. I will definitely be a returning costumer. Love the cooling moisture wicking fabric. Excellent clothing to work out in or just lounge around in on a hot day.

Michael B.
Like I’m wearing air

Awesome fabric that minimizes chafing. Very light weight to allow airflow and keeping cool. I recommend getting a size to fit loose.

Paul S.
Best singlet out there, especially if you chafe

I've bought so many singlets over the years trying to find something that won't chafe under varied conditions, and the AFO Singlet is the one!

The fabric is a bit strange at first - especially putting it on & removing it - but once you get used to it, it's a dream. Impossibly light, great at keeping me cool, a great selection of patterns, and no chafing! What more could you ask for? I now own 5 of these and even wear them as a base layer for winter running.

So light and breathable

I am a big Janji fan. I bought the AFO singlet in plaid H2O vine. I love this plaid design! This singlet was very breathable - wicking away sweat quickly. It feels great and is so light. It is my new favorite racing shirt! Plus, a percentage of the sale of this singlet is given to fund clean water projects.