adidas Adizero Adios Boost 2 Running Shoes Energy Boost Midsole - Every step becomes charged as the Boost midsole absorbs some of the energy from your footstrike and charges it into forward momentum Full-Length TORSION System - Midfoot shank which adds strength and integrity to the trainers. Sprint Web - Offers well rounded upper support, lightweight and enhances the overall fit greatly. Coolever Mesh - Lightweight mesh and lining in a clover shaped yarn helps to manage and eilminate heat and sweat build-up. External Heel Counter - For a snug heel fit and comfort in motion with enhanced support and stability.