ORUUN Sunset Heat 43g ultra-light running tank in orange wave print, front view – breathable DRY FLOW™ racing singlet for hot weather
ORUUN Sunset Heat 43g ultra-light running tank in orange wave print, back view with ORUUN logo – breathable DRY FLOW™ racing singlet for hot weather
ORUUN Sunset Heat 43g ultra-light running tank in orange wave print, worn by runner, front view – breathable DRY FLOW™ racing singlet for hot weather
ORUUN Sunset Heat 43g ultra-light running tank in orange wave print, worn by runner, back view – breathable DRY FLOW™ racing singlet for hot weather
ORUUN Sunset Heat 43g ultra-light running tank in orange wave print, weighing just 43g on a kitchen scale – breathable DRY FLOW™ racing singlet for hot weather

Sunset Heat 43g Ultra-Light Running Tank | DRY FLOW™

$99.00 AUD

A featherlight running tank engineered for hot-weather training, maximum airflow, and unrestricted movement.

Made from ultra-lightweight Italian technical fabric, it delivers exceptional breathability, rapid drying, and a smooth, clean feel against the skin. The sleeveless performance cut opens the shoulders for natural movement, while the DRY FLOW™ System helps release excess heat and move moisture away from the body—reducing the heavy, clingy feeling that can develop during warm or humid runs.

Size
Size: XS
ORUUN Sunset Heat 43g ultra-light running tank in orange wave print, worn by runner, front view – breathable DRY FLOW™ racing singlet for hot weather

Ethan is 180 cm / 5'9" and is wearing a size L

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: 18 (90%)
  • 4 stars: 2 (10%)
  • 3 stars: 0 (0%)
  • 2 stars: 0 (0%)
  • 1 star: 0 (0%)
L
Lily H.
Fits my very ordinary running life

No marathon plan here. Just a few laps of the park after work. The soft feel and open shoulders are still well worth having.

J
Jack S.
Such a good orange

The tonal pattern looks better than a single flat block of colour. Happy with this one.

M
Matilda P.
Great colour, fit worth checking

The orange and red combination is exactly my sort of thing. I'd prefer slightly less length through the body, but the tank felt very comfortable once I was running. Check the measurements if you're short waisted like me.

E
Emily A.
Why the weight matters to me

I don't chase grams for the sake of it. I do dislike a singlet getting heavy across my collarbones after a sweaty warm up. This stayed unobtrusive there, which made the listed 43 g feel relevant rather than just an interesting number.

G
George M.
The shirt isn't the loudest thing

Orange and red tank, wheezing runner. At least one of us looks ready for hills.

J
Jacob Y.
Race bag shortlist

Fine fabric, open shoulders and very little bulk. All things I look for when choosing a top for a warm start line.

N
Noah M.
Useful when effort rises

On quicker sections I tend to swing my elbows further back. The arm openings stayed out of the way and the fabric didn't drag across my chest. A good choice for sessions where the pace changes often.

E
Elijah B.
Less material, more air

Exactly why I wanted a singlet. This one does it nicely.

M
Mark D.
Almost perfect

Genuinely lightweight, well constructed. The only nitpick: neckline is cut a touch lower than I'd like for a running tank. Stays in place but I notice it. Otherwise fantastic.

M
Mason H.
Nice for the walk home

No scratchy feeling as the fabric started drying. That was a pleasant end to the session.

F
Felix O.
lightest singlet i own

barely feels like im wearing anything. perfect for hot-weather lifting and runs. clean cut too

S
Sophie A.
A change after years of plain kit

I normally buy black, partly out of habit. My daughter talked me into Sunset Heat and I'm glad she did. The design is cheerful without feeling like a thick print sitting on the fabric. I wore it for my usual run by the water and particularly liked the room around my shoulders. Not a dramatic story, just a piece of kit I was pleased to put on again.

A
Abigail M.
A little encouragement

The bright design makes me more inclined to put my kit on. After that it's mostly the dog who gets me out the door.

R
Renee T.
Yoga + run hybrid

Switched between vinyasa and a 5k tempo yesterday wearing this. Held shape through both. Armholes are cut high enough that I don't worry about side-bra exposure during arm balances.

S
Sophie L.
hot-room approved

Crammed studio in summer = sauna. This was the first tank that actually let me finish the warm-up without already being soaked. Fabric dries between sets.

M
Mason B.
Orange is the point

Wanted an orange singlet and this delivers. The red sections give the design some depth.

O
Olivia W.
The halfway fountain

Stopped for water and splashed rather more of myself than intended. The singlet felt wet, naturally, but not awkward or heavy when I set off again. I liked that the material remained flexible instead of holding against the same patch of skin. It didn't make the climb any easier, but I wasn't fighting the top as well as the route.

B
Brendan M.
Lighter than my Tracksmith Twilight

I love my Tracksmith Twilight singlets but they're not winter-priced. This ORUUN tank weighs noticeably less and breathes equivalently. At AU prices, it's the obvious daily-training pick.

J
Joel C.
My Aussie summer race-day kit

Sydney summer races regularly hit 30°C+ and a singlet is the difference between finishing strong and cooking yourself by 25k. The aerodynamic cut on this tank sits flat without compressing, the airflow gradient on the back genuinely feels like a wind tunnel when you pick up the pace. Wore it for the half at City2Surf last year. PB territory.

D
Diego M.
Hot-weather trail kit

22k hot-weather trail run on a recent Pyrenees trip. Tank breathed great, didn't chafe at the armholes. Shoulders never felt loaded.