Technical description of MEDICOVI-Twin-heels 

The sensory water filled massage sole

A vital condition for the sensory water filled sole to give sensory massage is that when the sole is exposed to pressure loads it is able to build up a dynamic hydraulic pressure under the foot bones. This means that the sole has to be strong enough to carry the body's weight through the dynamic hydraulic water pressure inside the sole.

During construction of the water filled sensory massage sole a number of specially developed materials has been used. The patented lamination provides the sole with excellent strength and stability which is necessary for the sensory massage.

The sole contains water as water is fast flowing, this being an absolute prerequisite for affecting the sensory massage and the hydraulic pressure equalization.

To further optimize the water movement the welding of the sole has been done by a special welding method that creates a hollow space between the two foils ensuring optimal water movement. Furthermore the sole is supplied with welding patterns on the sole surface that controls the water movement ensuring that the sole mainly builds up pressure equalizing water cushions under the heel and forefoot.

The underside of the sensory water filled massage sole is provided with a friction film that ensures that the sole stays put in the shoe.

The laminates that make up the sole must invariably follow the fast movement of the water under the huge dynamic hydraulic pressure and this movement causes wear and tear on the laminates. At a certain stage, the wear and tear does cause tiny holes in the laminates and water will evaporate. 

Shock-absorption and pressure relief in the sensory water filled massage sole

In the heel the sensory water filled massage sole MEDICOVI-Front has a welding pattern that functions as double valve that regulates the speed that water under pressure can flow freely under the forefoot. The double heel valve provides an affective shock-absorption and pressure relief of the heel bone, especially at low speeds, where the build in shock-absorption in shoes normally don't work.

When the soles heel surface is exposed to pressure load it will take time for the water to pass through the double heel valve, which will increase the collision time. At the same time the pressure on the heel will raise the hydraulic pressure in the water that has yet to pass through the double heel valve. The hydraulic pressure will distribute the pressure force from the heel to a larger surface of the heel cushion, making the collision area larger. The raise of the collision time and the collision area creates the shock-absorption in sensory water filled massage sole.

The double heel valve also slows down the water movement when the forefoot is exposed to pressure loads and causes the water to return back towards the heel. The double heel valve herby provides powerful effective shock- absorption and great pressure relief to the forefoot.

The double heel valves, slowing down of the water in combination with the inserted point barriers creates a water cushion under the forefoot and especially under the ball of the forefoot. The water cushion prolongs the collision time, at the same time the counter pressure in the water cushion will expand the pressure surface up against the ball of the forefoot (Collision surface), creating powerful pressure relief to the ball of the forefoot.

When you stand it is the heel and forefoot that is exposed to the biggest pressure loads. That is why the double heel valve and the inserted point barriers are constructed is such a way that they create a water cushion that is mainly concentrated under the heel and the ball of the forefoot.
 
The hydraulic pressure cushion under the heel and forefoot occurs when the water under pressure loads from the foot becomes enclosed inside the strong inelastic foils with the double heel valve and the inserted point barriers. As mentioned earlier it is the powerful force in the strong inelastic foils that enables the build up of the necessary hydraulic pressure creating the large pressure relieving carrying surfaces under the heel and forefoot and for the sensory massage.

Even when we are stand still every little movement of the body will change the pressure loads that the foot will transfer to the sole surface. In a regular shoe these many little body changes will not do anything significantly with the pressure loads under the heel cushion and the ball of the forefoot.
 
By placing the water filled sensory massage sole in the shoe the sole will create a hydraulic dynamical pressure cushion between the foot and shoe. The hydraulic pressure patterns in the sole will react to every single little

change of the body's position and create/provoke new and different pressure patterns under the foot. Especially under the forefoot the constant change of carrying surfaces will reduce the time- and pressure loads on sore and painful areas.

It is the constant varying hydraulic pressure patterns in the sole that creates the sensory massage. Every time the body changes its position the pressure load form the foot against the sole will change, creating yet another new hydraulic pressure pattern in the sole. The new hydraulic pressure pattern in the sole will provoke/force the foot to change foot position more frequently. The body's balance system will respond to the new foot position by activating the calf and thigh muscles which will make the body change position.

As mentioned above the sensory massage will create a great balance uncertainty unless the system is restricted. If you stand in a waterbed where there is no water restriction is would be very difficult to keep your balance. Due to the double heel valve and the precisely measured water amount in the sensory water filled massage sole the movement of the water is regulated, making sure that the water movements under the foot feels stimulating and comfortable while at the same time keeping the sensory massaging effect.

The shock absorbent and pressure relieving heel

During construction of the water filled patented shock absorbent pressure relieving heel protector the same strong patented laminates have been used as in the construction of the sensory water filled massage sole.

The heel protector is divided up in 2 parts, the pressure relieving cushion under the heel and the hydraulic spring system. The springy force in the hydraulic spring system and the added amount of water is attuned is such a way that an overpressure in the pressure relieving cushion under the heel occurs when the heel protector is exposed to no pressure.

When the heel touches the heel protector cushion a part of the water will be pressed into the hydraulic spring system. The counter pressure from the spring system will reduce the shock forces by prolonging the shock time. (Collision time), at the same time the counter pressure in the pressure relieving cushion will increase the pressure space up against the heel. (Collision space).  The heel protector hereby provides a powerful shock-absorption.

After the shock impact the hydraulic spring system will force some of the water back under the pressure relieving cushion dependent on the pressure from the heel. Ensuring that there is a constant variation of pressure combined with pressure relieving water cushions under the heel.

In order for the heel protector to work it has to be able to move with the sensory water filled massage sole. Therefore the heel protector is only welded on to the sensory water filled massage sole in 6 small points.

The heel protector now functions independently of the sensory water filled massage sole. This means that MEDICOVI-Twin-heels provides shock absorption from the sensory water filled massage sole as well as shock absorption from the heel protector. After the shock impact the heel protector creates a pressure relieving water cushion under the heel with a dynamic pressure variation. This means that when walking or standing the heel bone is protected by the water filled pressure relieving cushion in the heel protector. All combined MEDICOVI- Twin-heels provides a powerful dynamic relief of the heel, knee, hip and back.

The moisture absorbent and ventilated mesh surface

Environment of the foot 

Facing the foot MEDICOVI-Twin-heels is provided with a patented mesh and cotton construction. The mesh construction has been developed in such a way that a pump-like effect introduction fresh air under the foot, takes place when pressure changes on the mesh occur. As the water in the sole constantly makes the foot move, the pump-like effect is  

effective in reducing the temperature between sole and sock and decreasing the problems of sweaty feet. The mesh facing the foot is very smooth allowing the sole to be used with or without socks (nylons).

Under the mesh surface a strongly absorbent reinforced cotton material has been applied. This is treated with an anti fungicide  “Sanitized T 90-04”.  Moisture from the mesh surface is immediately absorbed by the cotton fabric ensuring that the mesh surface facing the sock is always dry, reducing any tendency to athlete's foot.

The fat from sweaty feet can fasten to the cotton fabric causing the moisture absorbent effect to decline. MEDICOVI-Twin-heels can be washed with normal laundry detergents at temperature of up to 40°C. If machine washed, a wash bag must be used. 

Size of the sole and shoe

The length of MEDICOVI- Twin-heels must correspond to the foot but in such a way that there is no water under the toes.

Place the MEDICOVI-Twin-heels with the netting facing the foot, sure that the heel is hard against the inside heel of the shoe.
MEDICOVI-Twin-heels is 2 mm thick under the forefoot and 4 mm thick under the heel. The shoe should be large enough for the foot to be able to move once the sole has been inserted.

The MEDICOVI-sole is made to fit two shoe sizes. The toe piece, which does not contain water, may be cut to the smaller shoe size with scissors. Fore example from size 43 to size 42.

In open shoes without heels, the MEDICOVI-Twin-heels must be securely attached to the inside bottom of the shoe. In shoes without a heelpiece a piece of Velcro can be placed on the bottom of   MEDICOVI-Twin-heels across the sole over the welding pattern just after the heel.

Selection

Getting used to the soles

MEDICOVI-Twin-hels increases circulation in the feet and legs through strong activation of the sole of the foot as well as the calf and foot muscles. Sore muscles may be experienced at first until a reasonable state of fitness has been achieved. Some people may initially think that the soles contain unequal amounts of water. The reason for this is, however, that our feet have different tolerance levels and this sensation will quickly disappear. Anyone suffering from dizziness may experience problems with the sole due to the continual movement of the foot. However is should be noticed that clinical tests have showed that the soles helps to improve posture and balance.

Life span of the soles

With normal use the soles will work for about one year. In order to achieve maximum relief from the soles it is therefore recommended that the soles be replaced at least once a year.

Guarantee

6 month's guarantee from date of sale provided that soles have been subjected to normal wear and walking patterns.