Pro Man PM4040 Composite Trainer S3 Black Super lightweight and Flexible, Constructed using a Highly Breathable and Moisture Wicking Sandwich Mesh Lining, the PM4040 Trainers are Designed for Wearers that are On Their Feet for Long Periods of Time. The Composite Toecap, Composite Midsole and Plastic Eyelets make these Boots 100% Non-Metallic and Ideal for Use in Secure Areas such as Airports. Lastly the Rubber Scuff Cap and Kick Off Protector Enhance the Durability.