The Stretchweb outsole made of Continental rubber also guarantees optimal rolling behavior and superior traction. Features - Pureboost 22 Running Shoe Laces Custom woven mesh upper material Responsive cushioning Textile lining BOOST midsole Rubber outsole Technology Boost - endless energy Boost is adidas' revolutionary cushioning material. Boost has thousands of small visible energy capsules that are bonded together using a special process to form a midsole. The capsules endlessly store and release energy every time your foot hits the ground. The shoe retains its properties in the depths of winter as well as the height of summer, making it significantly more temperature resistant and durable than conventional materials. The innovation from adidas offers you comfort paired with dynamics: it will inspire you!