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Description
Introducing the world’s only heated stretch device. Patented globally. USA owned and engineered with a premium LG Lithium rechargeable Battery.
Targets:
- Plantar Fasciitis - Heat soothes and loosens the fascia that connects to your plantar fascia for faster healing .
- Knee Pain - Now you can address ACL recovery with a heated PT routine for improved circulation.
- Tight Calves - Place your heel in the insert. Wrap the heated stretch sleeve around your calf and gently pull towards your waist for a heated calf stretch.
- Tennis Elbow- No device in the world will feel better for this chronic pain issue. Place your elbow in the insert and feel the warmth envelop you.
30 Day Return Policy
USA Owned

The Best Stretch Ever just got HEATED
CastleFlexx Heat
How does the Heat Edition work?
Designed by inventor Dan Castle and a group of talented clinicians and Doctors, the Heat Edition warms up key areas that need extra relief allowing for a more pleasant stretch experience.
Hold the Power button down for 3 seconds to activate the Heat and stretch away.
The updated heel support is thicker and wider and more secure than the Luxury and Sport models.
The Heat can be switched off by pressing the Power button down for 3 seconds.
It will also automatically shut off in 30 minutes for safety reasons.
Are socks needed?
Always wear thin socks if you have sensitive skin. Your foot is a sensitive area so the heat will only be present in certain areas that our Physicians approved. The temperature is also a soothing heat, not a “hot” heat for many safety and health reasons.
Why choose this over the Luxury or Sport?
Heat heals and soothes, our feet are cold often because that is where we have the most circulation issues. This device addresses it for the first time and we have tested it since 2022. It is only available now for everyone, many upgrades and tech was implemented over the years to make sure this would help the most nagging chronic pain issues our FlexxFam has requested we address.
Is the HEAT Edition FSA/HSA Eligible?
Yes, just add it and anything else you need to your cart and then click "PAY WITH HSA/FSA" funds. It will ask you a few simple yes/no questions and Truemed will process your approval.
How does the HEAT compare to the Luxury?
The HEAT has a special contoured heel placement that provides better and comfier support for the achilles. The bar does not have the 2lb interchangeable weight system for full body strengthening ( Luxury has the FlexxBar). The handles of the HEAT are slightly larger for an easier grip experience. The stretch sleeve is made from the same RPET fabric ( premium recycled plastic). While the Luxury is a more full body experience for active and passive stretching since it doubles as a weighted mobility bar, the HEAT is more for stretching only and will be the most relaxing release for your tight plantar fascia, achilles , calves and knee.
How do I charge the HEAT and how often?
We partnered with LG Lithium USA to offer the highest quality USB-C rechargeable battery. Click the power button 3x to see the battery level. Hold it down for 3 seconds to turn ON/OFF. If the lights are circling, that means its heating up and should take less than 45 seconds to get to the proper temperature.
WARNING: Always wear thin socks if you have sensitive feet, the longer your foot is in the cradle, the hotter it will feel as our feet do not have fat pads. If it still feels too hot for you just wear thicker socks.