TECH SPECS

Breathability
Built for shifting conditions.
Low Airflow High Airflow

Moisture Wicking
Keeps you dry through every run.
Low Wicking High Wicking

Fit
Performance Fit
Weight
43 g (Size M)
Materials

89% Polyester

11% Elastane

Care
  • Machine wash cold
  • Wash with like colors
  • Do not bleach
  • Lay flat to dry
  • Do not iron
  • Do not dry clean

FUNCTIONALITY

4-WAY STRETCH
4-WAY STRETCH
Engineered elasticity moves with your body for unrestricted motion and precision fit.
BREATHABLE AIRFLOW
BREATHABLE AIRFLOW
Micro-grid construction enhances ventilation to keep you cool when the pace rises.
RAPID DRYING
RAPID DRYING
Dries fast to reduce cling and maintain comfort through high-intensity efforts.
RECYCLED PERFORMANCE
RECYCLED PERFORMANCE
Built with advanced recycled yarns, combining sustainability with high-performance output.
Fabric sustainability certification logo – ORUUN running apparel materials
#greenperforming fabric label – sustainable Italian performance fabric used by ORUUN
OEKO-TEX Standard 100 certification – ORUUN running apparel fabric tested for harmful substances
bluesign SYSTEM PARTNER certification – responsible Italian technical fabric used in ORUUN running apparel
Recycled fabric certification logo – sustainable materials in ORUUN running apparel

LIGHTWEIGHT COMFORT

Ultra-light construction feels barely there, allowing you to move freely without distraction or bulk.

Close-up of ORUUN breathable mesh running fabric – DRY FLOW™ airflow structure
Close-up of ORUUN ultra-light Italian technical running fabric with breathable grid texture

Product Details

Please read our FAQs page to find out more.

Is the ORUUN Running Tank suitable for hot and humid weather?

Yes. The ORUUN Running Tank is designed for running in hot and humid conditions. Its ultra-light construction and breathable technical fabric are designed to reduce unnecessary bulk and restriction as temperature, humidity and effort increase.

What is the ORUUN Running Tank made from?

The ORUUN Running Tank uses MAESTRALE ECO GRS fabric from MITI Spa in Italy. Made from 89% polyester and 11% elastane, the fabric uses post-consumer recycled polyester and was selected for its low weight, stretch, ventilation and breathability during high-output running.

How does the ORUUN Running Tank fit?

The ORUUN Running Tank has a performance-focused fit designed to sit cleanly on the body while keeping excess material to a minimum. Its stretch construction supports natural movement without requiring a loose or bulky fit.

What types of running is the ORUUN Running Tank designed for?

The ORUUN Running Tank is designed for warm-weather training, tempo sessions, intervals, long summer runs and race efforts, particularly when low weight, ventilation and freedom of movement are priorities.

What is ORUUN DRY FLOW™?

DRY FLOW™ is ORUUN’s performance approach for running in warm, humid and high-sweat conditions. In the Running Tank, it combines breathable technical fabric with ultra-light, minimal construction to prioritise ventilation and reduce unnecessary restriction during high-output running.

  • 5 stars: 20 (95%)
  • 4 stars: 1 (5%)
  • 3 stars: 0 (0%)
  • 2 stars: 0 (0%)
  • 1 star: 0 (0%)
F
Florence K.
Tiny in the kit bag

Shoes take all the room. This hardly takes any.

M
Max S.
For warm track evenings

Used it through a warm up, repetitions and a slow cooldown. The Maestrale Eco fabric felt fine against the chest and didn't pull down from the shoulders once damp. For me, that's the useful side of a very light singlet. Not free speed, just less clothing getting in the way of a session that already needs concentration.

E
Emily G.
The fabric bends with you

Noticed it leaning into a hill. There wasn't a firm pull across my chest as my posture changed.

G
Grace N.
43 grams made me curious

The listed medium weight sounds tiny, and the tank does feel remarkably slight in the hand. Running in it, I noticed the free shoulders even more than the weight.

J
Joshua C.
Yellow green on navy

The Solar Lime pattern really stands out against the darker blue. It feels as lively as the picture looks.

E
Evie H.
A comfortable club run

Stayed with the slower group and chatted most of the way. No irritating rubbing under my arms to interrupt the conversation.

A
Ava S.
A beginner can enjoy nice kit

Only running a few minutes at a time so far. I like how this lets air reach me between the walking breaks. You don't need an impressive pace to appreciate a comfortable singlet.

L
Leo T.
For running, not just standing around

Some tops look great in a mirror and become annoying as soon as you move. This one made more sense on the run. The arm openings gave me space, the fabric moved when my torso rotated and I could feel air when I got onto an open stretch. I like the Solar Lime design, but the moving part is why it will stay in rotation.

A
Archie H.
No bulky shoulder straps

The tank feels delicate in weight but sits comfortably across the shoulders. I didn't get that sense of carrying wet material from the top down.

C
Clara S.
Would suit my shape with a shorter body

Lovely low weight and I like the blue and yellow green combination. The body is a little long on me. Not enough to stop me wearing it, just my personal alteration wish.

A
Amelia F.
PB tank, no exaggeration

Wore this for my last half marathon attempt and barely registered I had it on. The aerodynamic cut sits flat against the body without any compression weirdness, so no flapping in the wind on the downhill stretches. Sweat-wicking was clearly tuned for performance — I finished damp, not soaked. New PB by 90 seconds. Some of that was the training. Some of it was kit.

E
Elijah Y.
The cheerful choice

The yellow green detail over blue puts me in a better mood before a difficult session. Can't promise it improves my attitude after the third hill.

I
Imogen B.
Cairns morning run survival kit

Did a 12k in Cairns at 28°C / 90% humidity. This tank dried back to comfortable in the breeze along the foreshore. Pretty rare for tropical-coast runs.

C
Charlie W.
A better damp feel

Still wet at the end, but easy to lift off the skin. That matters much more to me than how a singlet feels dry in the bedroom.

L
Lauren K.
Borrowed from my husband — keeping it

He bought it. I wore it once on a hot run. He bought a second one because I refused to give it back. We're both happy.

A
Anika B.
race day fit secured

copped this for a 10k. ended up wearing it for everything since. lightweight + cute > big-brand singlets twice the price

Z
Zara E.
My first singlet

Felt a bit exposed standing by the front door. Five minutes into the run I understood the appeal. Lovely having nothing over my shoulders.

T
Thomas R.
Not reserved for the young ones

Started running in my late fifties and only recently tried a proper singlet. I had assumed they were for much faster people. This has been a pleasant correction. The open shoulders and very fine fabric make a warm morning more comfortable, and the colour is rather fun. My pace is unchanged. My willingness to get dressed and head out has improved.

F
Felix O.
Strength session staple

Bench, squats, deadlifts. Tank stays put, doesn't ride up to my chest when I lie flat. Side panels move with the body.

S
Stephen N.
Built right

Stitching is clean, hem is bound (not just rolled), seams sit flat. The technical decisions add up to a tank that doesn't distract you while running. That's the whole job, well done.

S
Stephen V.
My new On Performance-T replacement

I've been wearing the On Performance-T for years. This is a noticeably lighter, slightly looser cut with a similar fabric story. At ORUUN's price point, it's quietly replacing my On singlets one by one.