Performance Helly Hansen Chelsea Evolution 2 Boa Mid S3 safety shoes with composite toe protection and non-metallic nail penetration sole. Lightweight and breathable they provide long lasting cushioning and moisture management. Sole construction with light weight EVA in the midsole and slip and stains resistant rubber outsole. With molded heel overlay, reflective design details and BOA® Fit System, a precise fit can be obtained fast and effortlessly.