Biothermal insoles
They reflect the heat of your foot instead of dissipating it. A gentle daily thermal stimulus supports thermoregulation and microcirculation – no electricity, batteries or active substances.
A set ready to wear
The package contains a pair of insoles and instructions for use. You trim the insoles to the shape of your shoes and move them between pairs of shoes throughout the season.
Effect confirmed by research
The Collegium Medicum in Bydgoszcz and a laboratory in Kielce measured the skin temperature of the foot, lower leg and thigh after using the insoles. The full results are available to download.

Biothermal insoles
They warm you with your own body heat – no electricity, batteries or charging.
Price from10,00 zł
Order insolesSince 1993
CE medical device
Backed by research
Dispatch within 2 days
How to use the insoles step by step
Four steps that make biothermal insoles work as they should.
The insoles don't heat – they shield the warmth of your foot and return it. Just choose the right size and wear them every day.
Heat shielding, not heating
A gentle stimulus
An effect that builds over time




Our product categories
Four product groups based on one principle: reflecting your body's own heat.
Featured products
Piokal's most frequently ordered products – we ship them within two business days.
What wearing the insoles every day gives you
Three effects our customers mention most often – and which skin temperature studies confirm.
Warm feet and hands
Better microcirculation
No electricity, lasts for years

Warmth that returns to your feet
Piokal biothermal insoles – natural felt, sizes 35 to 47, made in Poland since 1993.
What people who wear the insoles say
Clear improvement in comfort and energy during the day
Lighter legs and less swelling after standing work
Feedback from members of the Polish Association of the Blind in Przysucha
I have been using bio-thermal inserts for over six months now.
Information obtained from members of the Polish Association of the Blind
I have been observing people using bio-thermal inserts for 1.5 years now.
Frequently asked questions
We've gathered the topics that come up most often before choosing and while using the insoles.
Choose a topic you're interested in Browse the questions our customers ask most often.
What are biothermal insoles?
Biothermal insoles are a medical device.
On 6 June 2008, by decision of the Office for Registration of Medicinal Products, Medical Devices and Biocidal Products, ul. Ząbkowska 41, Warsaw, they were entered in the Register of Medical Devices under no. PL/DR 016012.
What are they for?
Biothermal insoles are a supportive and preventive therapeutic aid for people with thermoregulation disorders.
What do they do in the body?
Biothermal insoles are designed to raise body temperature and improve blood circulation. With a daily thermal correction that works by shielding your own energy, hands and feet become warm. The insoles give warm feet to people with microcirculation disorders caused by diabetes and peripheral atherosclerosis. They are a natural aid supporting medical treatment for people of all ages.
Where should they be worn?
The insoles are intended for closed shoes with a covered heel. They can be used all season long, e.g. in low shoes, sandals, slippers with a covered heel, boots or sports shoes. The shoes should be loose – do not use the insoles in tight shoes, so as not to restrict blood circulation.
How do they work?
Used as shoe insoles, biothermal insoles shield the thermal energy of the feet. By reflecting heat rather than dissipating it, they influence the body's thermoregulation processes and, with them, microcirculation.
The insoles provide a thermal stimulus of low intensity and long duration. Under the influence of the thermal stimulus, the blood vessels dilate. These changes cause a significant increase in blood supply to the skin, which also affects the functioning of internal organs and the cardiorespiratory system and stimulates immune responses.
Using biothermal insoles raises the skin temperature of the foot, lower leg and thigh.
Has the effect of biothermal insoles been confirmed by scientific research?
Yes, the positive effect of biothermal insoles has been confirmed by scientific research carried out at the L. Rydygier Collegium Medicum in Bydgoszcz and at the Laboratory of Biotronics and Electrophotography in Kielce.
It is also confirmed by the opinions of doctors and insole users held by our company.
Any questions? Call or write to us
We'll help you choose the right size, explain how to use the products and take your order – Monday to Friday, 8:00–15:00.
- ZPH “Piokal” Alicja Ostrowskaul. Żurawiec 2, 32-500 Chrzanów, Poland
- 600 450 000From abroad: +48 600 450 000
- [email protected]
- Opening hoursMonday – Friday, 8:00 – 15:00
- NIP: 6280005472





