WHAT IS PENETRATION RESISTANCE?
Penetration resistance in safety footwear is designed to protect wearers from sharp hazards like nails, glass, metal shards and more from penetrating through the sole of the footwear. Anti-penetration midsoles act as a barrier to prevent these objects from puncturing through the soles to the feet in order to safeguard from injury. Our anti-penetration midsoles are crafted from steel or a textile composition with fabrics like Kevlar interwoven together.
Steel vs APT: Key Differences
| Steel Midsole (SMS) | Anti-penetration Textile Midsole (APT) | |
|---|---|---|
| Material | Steel | Textile Composition |
| Flexibility | Less flexible, rigid | More flexible |
| Weight | Heavier | Lightweight |
| Composition | Solid metal structure | Woven textile |
Choosing the Right Midsole:
Steel midsoles are cut from solid sheets of steel to suit the specific mould and then the edges are treated to be more rounded so as not to damage the footwear. Through the manufacturing process, the steel plates are attached to the sole which leaves small gap around the edges exposed.
APT midsoles are woven tight in multiple layers with Kevlar or similar fabric compositions to ensure that there is no penetration. These APT sheets are cut to fit the exact shape of the sole unit, ensuring there are no gaps around the edges and proving a lightweight, more flexible solution.
Both options are tested to the same pressure to meet the EN/ISO 20345 or EN/ISO 20347 criteria. BOVA’s footwear is engineered with midsoles that meet industry-specific needs, ensuring the right level of comfort, durability, and protection.
WHY IS BOVA SAFETY FOOTWEAR ENGINEERED TO INCLUDE A SHANK?
What is a Shank?
A shank is a critical component in safety footwear, providing structural support and stability to the midsole. It reinforces the arch, reduces foot fatigue during long hours of wear and improves overall comfort. In high-risk environments, a shank enhances protection by preventing the sole from bending excessively, which is especially important when working on ladders or uneven surfaces. Additionally, it contributes to the durability of the footwear, ensuring that it maintains its shape and function over time.

