PUNCTURE RESISTANT BOOTS, STEEL VS FABRIC MIDSOLES
Puncture flesh wounds are particularly awful because screws, spikes, sharp scrap metal or the famous rusty nail puncturing the foot, can deposit bacteria and debris deep into the body, leading to dangerous infections and/or permanent foot damage.
The protective midsoles are embedded during the manufacturing process, between the insole and outsole of the puncture resistant boots. The standard specifies that the protective midsole of puncture resistant boots cannot be removed without damaging or destroying the boot. 2 main materials are used for protective midsoles: steel and Aramid (woven fabrics with high tenacity; eg. Kevlar by Dupont, Twaron by Akzo)
When puncture resistant boots have a woven fabrics midsole, they are most likely to have a composite toe cap too to create a metal-free, lightweight work boot. A crucial element on sites where metal detectors are used as employees enter and leave, for example high-security environments, such as airports, governmental buildings and military bases, where the scanning aims to prevent weapons from making their way in.
We made a list with all the differences you should know about a steel or woven fabric midsole in your search for the puncture resistant boot that suits your work.
 STEEL MIDSOLES |
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| Made from coated steel or stainless steel |
| More economic compared to textile/Aramid materials |
| Thinner than textile/Aramid midsoles |
| Embedded in the outsole construction, not visible when taking out the comfort insole |
| Conducting cold, heat and electricity |
| Recommended for protection against very sharp and tiny objects |
| Less flexible than textile midsoles, due to the characteristics of metal |
| Not protecting the full bottom surface of the footwear, few mm stay unprotected at the sides |
| Subject to corrosion after a period of time, when made in coated carbon steel, especially at the flexline area |
 WOVEN FABRIC MIDSOLES |
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| Made from Aramid fibers like Kevlar or Twaron |
| More flexible compared to steel midsoles |
| Less heavy than steel midsoles |
| Sewn onto the puncture resistant boots upper construction, visible when removing the comfort insole |
| Not conducting cold, heat and electricity |
| Recommended for people working in metal scanning environments |
| More comfort due to technical evolution towards thinner, more lightweight materials. |
| Protecting the full bottom surface of the shoe |
| Combined very high strength-to-weight properties, with excellent temperature, abrasion and cut resistance values |
Safety footwear and its protective grade is best chosen after evaluation (risk assessment) of the potential dangers in the work environment. The footwear should always be used as a last resort, it is the final line of defense against hazards, after all other reasonable or practical measures have been taken to manage the risks of the workplace. Impact, compression and puncture are the most common types of foot injury.
Common dangers are related to the kind of materials that are handled by the worker, risks of objects falling on or rolling over the feet, blades that might cut the top of the feet, or sharp objects that could penetrate the outsole of the shoe.
