Chelsea Evolution was built for use on dynamic work sites where you need lightweight protection that delivers on all day comfort. This concept has been updated with a high rebound EVA midsole and Ortholite® X25 Hybrid footbed for improved comfort. We’ve also updated our breathable and moisture wicking lining materials to include at least 50% recycled content. The new streamlined design also includes reflective details for increased visibility on and off the worksite. :Helly Tech® Waterproof Membrane Molded toe bumper Reflective Details Moisture wicking and breathable air mesh lining made of 50% recycled content Ortholite® X25 Hybrid Footbed - lightweight, breathable and provides long lasting cushioning and moisture management while using 20% eco-content in the formulation Lightweight and cushioning High Rebound EVA midsole provides +50% Energy Return with each step. Hellygrip Rubber