Bio-thermal insoles
They reflect your foot's own heat instead of dispersing it. A gentle daily thermal stimulus supports thermoregulation and microcirculation - no power, no batteries, no active substances.
A set ready to wear
Each package contains a pair of insoles and instructions for use. Trim them to the shape of your shoe and move them between pairs throughout the season.
Effects confirmed by research
Collegium Medicum in Bydgoszcz and the laboratory in Kielce measured skin temperature of the foot, shin and thigh after using the insoles. Full results are available to download.

Biotermal inserts
Warmed by your own body heat - no power, no batteries, no charging.
120,00 zł
Order insolesSince 1993
CE medical device
Confirmed by research
Shipping in 2 days
How to use the insoles step by step
Four simple moves that let the bio-thermal insoles do their work.
The insoles do not heat up - they screen the warmth of your foot and return it. All they need is the right size and daily wear.
Reflecting heat, not heating
A mild, long-lasting stimulus
An effect that builds up




Our product categories
Four product groups built on one principle: reflecting your own body heat.
Featured products
The most frequently ordered Piokal products - dispatched within two business days.
What daily use of the insoles gives you
Three effects our customers mention most often - and which skin temperature studies confirm.
Warm feet and hands
Better microcirculation
No power, made to last

Warmth that comes back to your feet
Piokal bio-thermal insoles - natural felt, sizes 35 to 47, made in Poland since 1993.
What people wearing the insoles say
Wyraźna poprawa komfortu i energii w ciągu dnia
Lżejsze nogi i mniejszy obrzęk po pracy stojącej
Informacje od podopiecznych Polskiego Związku Niewidomych w miejscowości 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 have collected the topics that come up most often before choosing and while using the insoles.
Choose the topic you are interested in Browse the questions our customers ask most often.
What are bio-thermal inserts?
The bio-thermal inserts are a medical product.
On 6 June 2008 they have been entered into the Register of Medical Products (with the number PL/DR 016012) following the decision of the Office for Registration of Medicinal Products, Medical Devices and Biocides with the seat in Warsaw at ul. Ząbkowska 41.
What are they for?
The bio-thermal inserts are a support and preventive therapeutic agent for people with thermoregulation disorders.
How do they influence the organism?
The purpose of the inserts is to elevate body temperature and improve blood circulation. With an everyday thermal correction achieved using a method of screening your own energy, hands and feet become warm. The inserts give an effect of warm feet to people with micro-circulatory disorders in the course of diabetes and peripheral atheromatosis. They are a natural agent supporting medical treatment for people of all ages.
Where should they be worn?
The inserts are to be used in closed footwear, with a covered heel. They may be used throughout the whole season in e.g. low shoes, sandals, closed-heel pumps, boots or sports footwear. Your shoes should be loose fitting. The inserts should not be used in tight footwear so that the blood circulation is not blocked.
How do they work?
The bio-thermal inserts used as insoles act as a screen for thermal energy of feet. Reflecting warmth instead of diffusing it, they influence the organism's thermo-regulation processes and micro-circulation.
The inserts are a thermal stimulus of low intensity and long-term effect. Thermal stimulus causes dilation of blood vessels. Those changes lead to significant improvement in skin blood supply, influencing also the functioning of internal organs, respiratory and vascular systems and stimulating immunological reactions.
The use of bio-thermal inserts causes skin temperature to increase in your feet, lower legs and thighs.
Are the qualities of the bio-thermal inserts confirmed by scientific research?
Yes, the positive effect of bio-thermal inserts was confirmed by scientific research conducted in Ludwik Rydygier Collegium Medicum in Bydgoszcz and in the Laboratory of Biotronics and Electrophotography in Kielce.
These effects are also confirmed by opinions of physicians and people using the inserts (opinions available in our offices).
Questions? Call or write to us
We will help you choose the size, explain how to use the product and take your order - Monday to Friday, 8:00-15:00 CET.
- ZPH „Piokal” Alicja Ostrowskaul. Żurawiec 2, 32-500 Chrzanów
- 600 450 000From abroad: +48 600 450 000
- [email protected]
- Opening hoursponiedziałek - piątek, 8:00 - 15:00
- NIP: 6280005472





