Design: Breathable mesh upper provides lightweight comfort The Active Ortholite Performance Insole is made of 98% recycled PU foam, which helps reduce waste and the use of virgin plastics Primus outsole is a light and thin 2mm performance outsole designed to get you as close to the ground as possible Additional Details: Weight: 246g / 8.7 oz (based on men's size EU 42 | UK 8 | US 9) Sole base: 2mm Tread depth: 2mm