Thermo Compression Shirt
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Description
Description
Best for: Firm compression around your core at the lowest price in the sauna range. Men's and women's sizes.
GRYNDWEAR's thermo sweat vest is a compression shirt that uses an inner heat-producing polymer fabric to raise the temperature around your midsection as you move, increasing sweat output through a session. Worn over the core, this thermo vest also provides firm compression that supports the torso and gives a smoother line under training kit.
The fabric is four-way stretch so the compression stays even as you move rather than rolling at the hem, and the inner face is smooth against the skin. The cut covers the abdomen and lower back, which is useful if you like a bit of warmth across the lower back during squats, deadlifts and conditioning work. The outer surface wipes clean and dries quickly between sessions.
It comes in a range of sizes for men and women — including a sweat vest for women fit — and the fit is intentionally tight, so measure at the waist and use the chart above. Understand what it does and does not do: it increases sweating, it does not burn fat or reduce fat in a specific area. Hydrate thoroughly, avoid wearing it in very hot conditions, and remove it if you feel light-headed. Check with a doctor first if you are pregnant or have blood pressure or heat-regulation concerns. Worn under a training top it is discreet enough that most people will not notice you have it on at all.
- Material: inner heat-producing polymer with four-way stretch
- Fit: firm compression across the abdomen and lower back
- Use: gym, cardio and conditioning sessions
- Sizing: unisex range - measure your waist and see the chart above
- Care: hand wash cold, hang dry, do not tumble dry
- Note: increases sweat output; does not reduce body fat on its own
Also in the lineup: Zip Sauna Vest for a zip front; Sauna Tank Top to layer under a shirt; Women's Sauna Top cut for women; Neoprene Sauna Vest for neoprene with a double zip; Sauna Hoodie with a hood, for boxing; Two-Piece Sauna Suit for full-body coverage.
Shipping and Returns
Shipping and Returns
Processing: orders ship within 1–3 business days.
US delivery: your estimated delivery window is shown under the Add to cart button, counted from today. You'll get a tracking number by email as soon as it ships, and you can check it anytime on our Track Order page.
Free shipping on orders over $65.
Returns: 30 days from delivery. See our return policy and shipping policy.
Warmth Across The Midsection
The inner fabric raises the temperature around your midsection as you move, which increases sweat output through the session.
The compression that comes with it supports the torso and gives a smoother line under training kit.
Worn for a normal session, not as a replacement for one. The work still has to happen.
Why GRYNDWEAR
An independent training brand built around one idea: gear should hold up to real sessions, not just look good in photos. We keep a tight lineup, pick every product for how it performs under load, and stand behind every order.
Frequently Asked Questions
How does it work?
The inner fabric holds heat around your midsection while you train, which raises sweat output through the session.
Is it comfortable to move in?
Four way stretch means the compression stays even through the movement rather than bunching or rolling at the hem.
Can I wear it under my training top?
Yes. The smooth outer face and flat cut sit under a shirt without showing a hard edge.
Who is it for?
Anyone who wants extra warmth and sweat through a session, and anyone who likes some support across the lower back during heavy lifts.
How do I clean it?
Wipe it down after training and follow the care label. Avoid high heat, which shortens the life of stretch fabrics.