Manchester has no gimmicks, just great safety footwear that does what you demand it to. Boa® L6 Fit System for fast, effortless precision fit. Composite toe protection and a non-metallic nail penetration sole. They have a lightweight EVA midsole and a slip resistant rubber outsole. :Boa® Fit System – L6 Molded TPU toe bumper Molded TPU heel overlay Non-Metallic hardware Reflective details Moisture wicking and breathable air mesh lining Composite safety toe Metal free nail penetration protection Open Cell PU Footbed - lightweight, breathable and provides long lasting cushioning and moisture management Lightweight and cushioning EVA midsole. Nitrile Rubber