A: No. Tweak uses a premium elastic waistband engineered to grip your skin — not just sit on it. Whether you're squatting, running, or doing back-to-back circuits, it stays exactly where you put it. It feels like a second skin rather than a band sitting on top of you.
Step 1 of 3
What is your waist measurement?
Measure around the narrowest part of your torso, just above your belly button. Keep the tape snug but not tight.
cm
Step 2 of 3
What are your hip measurements?
Measure around the fullest part of your hips and bottom, keeping the tape parallel to the floor.
cm
How would you describe your build?
This helps us fine-tune coverage and fit.
Your result
Based on your measurements, Small gives you the best coverage, minimal VPL, and the secure fit Tweak is known for.
All sizes — your fit highlighted
XS
Syour fit
M
L
XL
Fit FAQs
Q: Will the waistband roll down during a workout?
Q: Will it bunch or cave in when I sweat?
A: This is the problem Tweak was built to solve. The gusset uses a premium elastic construction that creates a snug, secure fit — so when moisture increases, nothing moves. This is the same moisture-related caving issue that affects many popular seamless styles. Tweak engineered around it from day one.
Q: What does the criss-cross stitching do?
A: The criss-cross stitching provides extra flexibility for movement. It allows the fabric to move with your body in multiple directions without pulling, bunching, or losing shape — whether you're stretching, squatting, or sprinting.
Q: I'm between sizes — what should I do?
A: Size up for comfort and a relaxed fit. Size down for a snugger, more secure feel during high-intensity movement. Still unsure? Take our 30-second size quiz at the top of this page.
Q: How does it wash? Will it lose its shape?
A: Machine wash cold on a gentle cycle and air dry. Avoid tumble drying — the premium elastic is designed to last but high heat shortens its life. Washed correctly, your Tweak holds its shape and grip wash after wash.
Size Chart
| Range | XS | S | M | L | XL |
|---|---|---|---|---|---|
| Core | AUD 8 | AUD 10 | AUD 12 | AUD 14 | AUD 16 |
| Perform | AUD 8 | AUD 10 | AUD 12 | AUD 14 | AUD 16 |
| Pulse | AUD 8 | AUD 10 | AUD 12 | AUD 14 | AUD 16 |
| Warm Up | AUD 6 | AUD 8 | AUD 10 | AUD 12 | AUD 14 |
| Range | XS | S | M | L | XL |
|---|---|---|---|---|---|
| Core | UK 8 | UK 10 | UK 12 | UK 14 | UK 16 |
| Perform | UK 8 | UK 10 | UK 12 | UK 14 | UK 16 |
| Pulse | UK 8 | UK 10 | UK 12 | UK 14 | UK 16 |
| Warm Up | UK 6 | UK 8 | UK 10 | UK 12 | UK 14 |
| Range | XS | S | M | L | XL |
|---|---|---|---|---|---|
| Core | US 4 | US 6 | US 8 | US 10 | US 12 |
| Perform | US 4 | US 6 | US 8 | US 10 | US 12 |
| Pulse | US 4 | US 6 | US 8 | US 10 | US 12 |
| Warm Up | US 2 | US 4 | US 6 | US 8 | US 10 |
⚠️ Warm Up Runs One Size Smaller
The Warm Up range is cut one full size smaller than Core, Perform, Pulse and Perform Hybrid. If you're a Core Small, order a Warm Up Medium