The Caliber Sauna Shirt

Let’s be honest. Losing weight feels like a full-time job. That’s why thousands are joining the 30-Day Sauna Shirt Challenge - a dead-simple way to shed water weight, drop a shirt size, and finally see progress without stepping foot in a gym.

Just throw on your sauna shirt and go for a 20-minute walk each day. That’s it. No crash diets. No exhausting workouts. Just consistent, low-effort movement that triggers serious sweat.

The heat-trapping fabric? That’s your fat-burning shortcut. By boosting your core temperature, it helps flush out excess water, reduce bloating, and kickstart your metabolism - even during light activity.

You’ll feel leaner, lighter, and more motivated each day. If you don’t go down a shirt size, you don’t pay. That’s how confident we are.

Outer Fabric: Outer: 92% Polyester 8% Spandex

Inner Fabric: 100% Polyurethane.

The inner layer features a thermogenic polymer blend that helps raise core temperature and intensify sweat during activity.

Wash: Machine wash cold with similar colors.

Dry: Hang dry or tumble dry on low. Do not bleach or iron.

Order Processing Times: 24-48 hours

Shipping Time: 7-10 days to arrive at your address

We offer a 120-day money-back guarantee. If the fit or performance doesn’t meet your expectations, you can return or exchange it hassle-free.

1. What makes this sauna shirt unique?
This shirt is designed with a heat-trapping inner layer that increases core temperature and boosts sweat production during workouts. It also features a snug compression fit that supports your core while enhancing your physique.

2. Can I wear this sauna shirt every day?
Yes! While it's optimized for workouts, many customers wear it under casual clothes for added sweat and core support throughout the day.

3. Will this fit my body type?
Absolutely. The fabric is stretchy and form-fitting, designed to adapt to a variety of body types. For a roomier fit, we recommend sizing up.

4. Does this shirt actually make you sweat more?
Yes. The thermogenic polymer lining increases your internal temperature, helping you sweat significantly more than in a standard workout shirt.

5. Is the material comfortable during workouts?
Very. The outer layer is smooth and breathable, while the inner layer intensifies sweat without sticking or chafing, offering all-day comfort.

6. How do I wash and care for the sauna shirt?
Machine wash cold with similar colors. Hang dry or tumble dry on low. Avoid bleach, ironing, or dry cleaning to maintain performance.

7. Can I wear this shirt under regular clothes?
Yes! It’s thin and discreet enough to wear under a hoodie, sweatshirt, or even workwear, making it ideal for daily sweat enhancement.

8. Is this shirt suitable for weight loss or body shaping?
It’s a great tool for both. It promotes sweating (especially water weight loss), while the compression fit helps you appear more toned and supports muscle definition.

9. Does the shirt roll up during exercise?
No. It’s designed with a non-slip hem that stays securely in place, even during intense workouts like HIIT, lifting, or running.