Your workout, sauna mode
Turn up the heat.
A thermal-lined training shirt that holds your heat so every session runs hotter. Looks like real gym gear, not a trash bag.
The one your gym bag is missing
ThermoCore Tshirt
$29.99
- Thermal lining holds your heat
- Stretch fit that moves with every rep
- Reinforced seams that don't rip
- Odor-resistant lining
Stay hydrated.
Stop wearing trash bags to sweat
Real training gear. Not a trash bag.
How it works
Every rep. Every round. Hotter.
-
01
Suit up
Pull it on like any training shirt. The thermal lining sits close to your body and holds your heat in.
-
02
Train
Lift, run, box or do a home circuit. You warm up faster and sweat harder, without a crinkly plastic suit.
-
03
Drink your water
Hydrate before, during and after. Sweat is water: replace it. Stop if you feel dizzy or unwell.
The one your gym bag is missing
ThermoCore zip up Vest
$29.99
- Thermal lining holds your heat
- Stretch fit that moves with every rep
- Reinforced seams that don't rip
Stay hydrated.
The one your gym bag is missing
ThermoCore Vest
$29.99
- Thermal lining holds your heat
- Stretch fit that moves with every rep
- Reinforced seams that don't rip
Stay hydrated.
The one your gym bag is missing
ThermoCore Hoodie
$49.99
- Thermal lining holds your heat
- Stretch fit that moves with every rep
- Reinforced seams that don't rip
Stay hydrated.
Feel the heat, see the sweat
Sweat is proof.
No miracle promises. Just a shirt that makes the work you already do run hotter, so you feel every round. Pair it with a plan, real food and plenty of water.
Straight answers
FAQ
What does a sauna shirt actually do?
The thermal lining traps your body heat, so you warm up faster and sweat more during a workout. It turns up the intensity of the training you already do.
What about the number on the scale?
Sweat is water. Any drop on the scale right after a session comes back when you rehydrate. ThermoCore makes your training feel harder; lasting change still comes from training, food and sleep.
How is this different from a plastic sauna suit?
It's built like real training gear: a stretch shell, a thermal lining and reinforced seams. No crinkling, no ripping on the first burpee, and you can wear it to the gym without looking like you're wrapped in a trash bag.
How should it fit?
Close to the body, like a compression-style training shirt, so the lining stays in contact with your skin. Check the size chart on each product page. Between sizes? Size up for layering, stay true to size for a snug fit.
Is it safe?
Drink plenty of water before, during and after. Stop if you feel dizzy or unwell. Don't use it if you're pregnant or have a heart condition without medical advice, and skip it in already-hot conditions.
How do I wash it?
Hand wash cold and air dry. Don't iron or tumble dry: heat damages the lining.
What if it doesn't fit?
Send it back. The full returns policy is linked at the bottom of every page, or message us and we'll sort it out.