Adidas Adizero Adios Boost Women's Running Shoes Energy Capsule 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 - Designed to contours around your feet to provide excellent suppport. This helps focus on generating maximum energy by compressing on specific muscle. 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.