Define Bra Tank
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Everyday Support
Cropped Length
4 way stretch
Your new go-to for daily movement, the Define Bra Tank balances support, softness and a flattering fit. Designed with a fitted silhouette, this tank features a soft halter neck strap, scooped neckline and open back for a lightweight feel. An inbuilt shelf bra offers light support with removable padding for customisable comfort. Perfect for studio sessions, brunch plans or running errands - blending active function with an effortless design that feels good from every angle.
Product Details
Product Features
- True to size (Fitted)
- Scooped neckline
- Open back with halter neck strap
- Inbuilt shelf bra
- Removable padding
- MN rubber patch logo
- Soft stretch fabrication
- Liberty fabric
- 71% Polyester, 29% Elastane
Size Guide
Model: Sianie - 175cm, wears size XS in Bras
Model Details
Sianie
HEIGHT: 175cm
WAIST: 66cm
TOPS: XS
BOTTOMS: XS
BRAS: XS
BUST: 85cm
HIPS: 93cm
Shipping & Returns
Returns
We hope you love your new items as much as we do! However, if you're not 100% satisfied with your purchase, we have a Returns Policy in place.
You may return full-price items for an exchange (either for the same item in a different size or a new item altogether), store credit, or a refund.
Please note that any items marked as "final sale" are not eligible for store credit or a refund, as outlined in our returns policy. However, final sale items can be exchanged for the same style and colour in a different size, subject to availability. If your desired size is unavailable, we appreciate your understanding that no return or further exchange can be processed.
Undergarments, socks and opened supplements are excluded from our returns policy and cannot be returned for hygiene reasons.
Find out more about our Returns Policy.
General Shipping Rates
Australia
New Zealand
USA, UK
Canada
Europe
All other countries
Shipping costs and delivery timeframes may vary per country, please enter your shipping address at checkout for specific rates.
Find out more about our Shipping PolicyAbout the fabric
Size Guide
Find your fit before you check out. Every measurement below is the garment laid flat — match it against a piece you already own, or measure your body and size to the closest range. Bodies are beautifully unique, so treat this as a guide.
Still unsure? Email orders@musclenation.org — our team will help you dial it in.
How to measure
Use a soft tape measure and keep it level. Measure over bare skin or close-fitting clothing for the truest reading.
Quick fit check
Enter your measurements to get a starting size for bottoms.
Bottoms & Leggings
Body measurements for all leggings, bike shorts, joggers and bottoms. Sizing runs XXS–XXXXL with AU equivalents.
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Inseam & Length
Inseam is the inner-leg seam length. Our Aura Straight Leg Leggings now come in three leg lengths — pick the one that matches your height.
Aura Straight Leg — inside leg by fit length
Short suits ~150–163cm, Regular ~163–175cm and Tall ~175–188cm. Inside leg is measured flat from the crotch seam to the hem.
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Aura Peachy — Rise
The Aura Peachy range comes in two rises. The High Rise waistband now sits 4cm higher than the Mid Rise for more coverage and core support.
Choose your rise
Both rises use the same buttery Aura Peachy fabric and sculpting scrunch — the only difference is how high the waistband sits.
Shorts — Inseam
Inseam length by short style. Use the bottoms chart above for waist & hip sizing.
Sports Bras
Measure around the fullest point of the bust and directly under the bust.
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Tees
Measured flat, not worn — match against a tee you already love. Oversized tees run a true super-oversized fit, so we don't recommend sizing up; size down for a less oversized look.
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How to measure
Use a soft tape measure and keep it level. Measure over bare skin or close-fitting clothing for the truest reading.
Quick fit check
Enter your measurements to get a starting size for tops & bottoms.
Bottoms
Shorts, joggers and bottoms. Body measurements, sizes S–XXXXL.
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Tops
Tees, tanks, singlets and hoodies. Body measurements, sizes S–XXXXL.
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Love this too so much! I ran 5km and had plenty of support. Also really good for weights days or even just running errands. I have multiple colours. I recommend sizing down here, I’m usually a S in bras/crop but got an XS based on other reviews and it fits perfectly. I’m 170cm and 53kg size 8 in tops and 12 B in bras.
Love it. Looks so good when training and gives me that extra confidence boost
Beautiful fabric and fit. I got a size larger, for a less compressive fit, but I think my original size would have been perfect.
I LOVE the fit of this top!! The length is perfect and provides so much coverage with my ref length shorts!
Love it the halter, really flattering fit perfectly
Style is cute, good support and great quality
Great support for someone with D cups and very comfortable material
Suuuuuper comfy and supportive! I was able to complete a solid back day in the gym with no wardrobe mishaps. The halter strap doesn't dig in to the neck and the back doesn't slip down. The only downside is that the white marks and stains VERY easily and it is very noticeable.
Love the halter design of this little top. It comes with removable padding so theres no need to wear anything under it. Comfortable for running and a weight session at the gym. I've even worn it causally with jeans
This is a must in your gym wardrobe. I have worn this to the gym and casually on weekends. Fit is perfect, great length, love the open back design.
Haulter neck with a built in shelf bra comes with padding its nice and long & the material is buttery soft! Very flattering cut i love it
Great quality Crop, beautiful colour, great fabric
Love the design, the fabric is amazing and great quality
Comfortable & looks great
The fabric is so soft, beautiful colour, true to size and great quality
Comfy, good material. Tight in all the right places.
I have several of these tops. I need the XS (sadly) and they fit well. No fear of slippage and they show off my back beautifully!
Omg I love this!! I was very unsure because it's not something irver wear but fits perfectly
Great fit. Halter neck sometimes folds over itself on the back of the neck, but that's par for the course I guess.
Looks great. Fantastic for Pilates ❤️
Love this!
Love! So comfortable to wear and the fit is so flattering! Ordering more in additional colours!!
Obsessed with the style and fit feel great in it
Love the style and fit just dislike its see through in some parts would have preferred for it to be double lined the whole way
Love the fabric, love the fit of it and how secure it feels
Wearing this on repeat. This colour is literally so stunning constantly getting compliments and asked about it. Sizing is perfect. Doesn’t hurt your neck and a beautiful open back.
Soft comfy