FLEX-METAL®

FLEX-METAL®
Flex-metal® is an Ironwear® patented flexible polymer composite consisting of atomized high purity iron suspended between polymer chains of a proprietary thermoplastic elastomer. Flex-metal® is completely non-toxic and contains no lead or other harmful materials. Only food grade ingredients are used in Flex-metal® production. No toxic materials are allowed in any Ironwear® facility.

Flex-metal® weights are formulated to be soft and flexible with physical properties similar to a person's skin. This allows the weights to move, bend, and conform to a person's body without putting unwanted pressure on the body. The Flex-metal® weights create a soft flexible and protective layer for both the user and those around them. Because of this, the weights can be used safely in any environment or during any activity. They can be used safely by young and old alike, during rigorous exercise or even when in direct contact with others, such as during a sparring session.

Each Flex-metal® weight insert is covered by a protective swim suit fabric shell. The shell protects the soft rubber weights and allows the weights to slide easily into the pockets.

Flex-metal® weights can also be used in the water. A high chlorine environment such as swimming pools may cause some rust to form on the outside of the weight under the shell, but as long as the weights can dry after use, the oxidized layer should not cause any problems.

Ironwear Flex-metal® weight inserts are 1/2 x 2 x 4 1/2 inches inside and fit into all adjustable weights pockets in Ironwear® Vests, Ironwear® Pants, Ironwear® Hand Weights, Ironwear® Wrist and Ankle Weights, Ironwear® Shoe Weights, Ironwear® Head Gear as well as Ironwear® Blankets.

Ironwear® produces all of its weights in Pittsburgh using recycled steel to make high purity atomized iron, and because of the high volume of iron in the weights, a magnet will always stick to an Ironwear Flex-metal® weight. Ironwear® weights contain no lead. Due to lead's toxic properties, it is not allowed in Ironwear® plants.

Ironwear Flex-metal® weights bought from Ironwear have a lifetime guaranty against material and/or workmanship failure.



Flex-Metal® Versus Other Weights:

There are basically three types of weights.

A. Solid- Normally in the shape of bars or rods

B. Particulate- Normally shot or sand

C. Composite- Mixture of material with a dense material in a matrix



Solid weights made of steel and lead bars are the most common. Big advantages are that they are heavy and inexpensive.

Problems with solid metal bars:

1. Exercising with metal bars against the body has the potential to be very dangerous and should be done with extreme care. If you fall or bump into some one the solid metal bars may cause you or another harm.

2. Solid metal bars do not conform to the shape of your body and can cause tissues damage when you move.

3. Solid metal bars can interfere with your movement, and because they do not flex they can block your ability to twist and bend.

4. When you walk quickly, run or jump the solid metal bars move up and down. This jarring motion can cause more harmful impact on the knees, shoulders and spine.

5. Vests made with solid metal bars tend to hike up the torso during many exercise like jumping rope or running. The wearer soon finds the vest has hiked up to his neck and is hitting his chin.

6. You can not do floor exercises such as sit-ups without the bars pressing into you.

7. Lead bars are by their nature toxic and must be handled with care and checked to make sure no lead is leaching out, coated lead can still leach out. Disposing of lead bars can also be difficult.

8. Vest made with solid metal bars must have the bars placed in a locations where you will not bump or press into them. For this reason they can not be positioned uniformly over the body.



Metal bars can be extremely dangerous if you fall and they move around during exercise. Metal bars also block your movement and can not be used comfortably for floor exercises. Shot and sand bags although less dangerous move around and bulge out causing localized high pressure areas which can chafe and bruise, and are also not suitable for floor exercises.



Particulate Weights-- Normally consist of metal shot or other particulate such as sand or limestone

The main advantages are that they are lower cost and safer than solid weights, so long as they do not contain lead shot.

Disadvantages of Particulate Weights:

1. Metal shot settles at the bottom of the bags creating lumps in the vest.

2. Metal shot shifts in the bag when you move. The more you move the more the shot moves around, increasing the impact on your knees, shoulders and spine.

3. When you bend, the lumps press into your body and cause localized pressure. Metal shot does not bend with you, it resists your movement.

4. Floor exercises are often painful due to the lumps.

5. The movement of the metal shot also causes the vest to hike up in the same way as the metal bars.

6. The movement of the metal shot in the bag causes the bag to wear out quickly and leak.

7. Never buy vest that uses metal shot made of lead. As the lead moves against itself it creates lead dust, the dust passes through the fabric easily and this dust is very dangerous to you and especially children. See lead poisoning.

Many vests are made with metal shot such as Valeo’s weight vest and many others.



Composite Weights-- Normally consist of a dense material contained in a matrix of another material. Concrete for example is a composite of small stones in a matrix of mortar. Composites are created to combine the properties of materials. In the case of Flex-Metal® very small particles of iron, which are very dense, are suspend in a flexible polymer matrix so that the resulting material is both dense and flexible. Many composites are often unstable because of the interactions or lack of bond between dissimilar materials. Creating stable composites is both an art and a science. Ironwear® has over 40 years of experience and more than 30 advanced composite material patents. Ironwear® has the knowledge, the experience, and provides a lifetime warranty for its products. Do not be fooled by third party imitation flexible weights now coming out of Asia, they will only cause you trouble.

We challenge you to find better weights.

If you have any questions please call us between 8:30 and 4:30 Monday through Friday Eastern standard time. 800-630-2779