• FitCore men's black compression tank top, front view
  • FitCore compression tank top, back view showing seamless construction
  • Close-up of FitCore compression tank fabric texture
  • FitCore compression tank top detail, blue panel stitching
  • FitCore compression tank top lifestyle photo, confident fit
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FitCore CoreFlex | Look Sharper. Feel Stronger. Be More Confident.

 Discover a smarter way to enhance your appearance while keeping you comfortable throughout the day. 

  •  Instant Body Definition 
  • Posture Support
  • Invisible Under Clothes
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  • Secure Checkout
  • 60-Day Money-Back Guarantee
  • Tracked Shipping
Size Guide
SizeBody weight
S50 - 70 kg
M70 - 90 kg
L90 - 110 kg
XL110 - 130 kg
2XL130 - 150 kg
3XL150 - 170 kg
4XL170 - 190 kg
5XL190 - 210 kg
Tip: CoreFlex is designed to fit snug for maximum compression. If you're between two sizes or prefer a more relaxed fit, choose the larger size.
Shipping & Returns
  • Orders processed within 1-3 business days
  • Delivery in 7-15 business days, with tracking
  • 60-day money-back guarantee
  • Questions? Use our Contact page and our team will reply within 48 hours
Product Details
  • Firm, high-stretch compression knit
  • Breathable and quick-drying, comfortable all day
  • Sleeveless tank design, discreet under shirts and polos
  • Colors: Black, Gray, White, Red
  • Sizes: S to 5XL
Care Instructions
  • Machine wash at 30°C or hand wash
  • Do not bleach
  • Do not tumble dry, hang to dry
  • Do not iron
Color
Size
View full details

Customers are saying

4.73 ★ (417)
Verified
Why men switch to CoreFlex

Look sharper the second you put it on.

No diet. No waiting. CoreFlex flattens your midsection, pulls your shoulders back and makes every shirt sit better, from day one.

  • ✓
    Instantly slimmer lookFirm compression smooths your belly and chest under any shirt.
  • ✓
    Stand taller, all dayCore support that keeps your posture straight without thinking about it.
  • ✓
    Invisible under clothesThin, seamless and breathable. Nobody knows you're wearing it.
  • ✓
    Your perfect workout partnerWear it at the gym to sweat more and stay motivated on your fitness journey.
GET YOURS — UP TO 70% OFF60-day money-back guarantee · Tracked shipping
FitCore CoreFlex benefits
The difference

Why FitCore?

Not all tanks are created equal.

FitCore CoreFlexRegular tank top
Instantly slimmer look✓✕
Posture support✓✕
Firm compression that holds its shape✓✕
Breathable, all-day comfort✓✓
4 colors, sizes S to 5XL✓✕
60-day money-back guarantee✓✕
60DAYS

Try it risk-free for 60 days

If you don't love how you look and feel in CoreFlex, reach out through our Contact page and we'll refund you. Simple as that. Read our guarantee

Real Customers, Real Results

See CoreFlex in action

Any questions?

Didn't find your answer?
We will be happy to help you here

What are the delivery times?

Orders usually arrive within 7 to 15 business days, depending on your country.

Do you have a money-back guarantee?

Yes — every FitCore order is covered by our 60-day guarantee.

How does the CoreFlex top work?

CoreFlex uses a firm, breathable compression knit that hugs your torso. It supports your core and back, encourages better posture, and smooths your midsection under clothing for an instantly sharper, more defined look. Worn during physical activity, it makes you sweat more and helps you lose weight as part of an active lifestyle. The perfect companion to stay motivated on your fitness journey.

What if the size isn't right?

No problem — if the fit isn't quite right, just reach out to us here and we'll help you with an exchange.

Can I wear CoreFlex all day long?

Yes, absolutely! We recommend wearing it under your clothes in everyday life, or during physical activity, to get the most out of it.

How long before I see a difference?

Results vary, but most people notice a visible improvement within 30 days. For the best outcome, wear CoreFlex consistently and pair it with healthy habits and light exercise.

Can CoreFlex be machine washed?

Yes, it's possible, but we recommend washing at 30° to avoid damaging the fabric and to keep the compression effective.