Adidas Adizero Adios Boost 2 Women's Running Shoes Boost Foam Midsole - Every step becomes charged as the Boost midsole absorbs some of the energy from your footstrike and charges it into forward momentum. Supportive Mesh Upper - Provides great stability, and a breathable, secure fit. COOLEVER - Lightweight mesh and lining in a clover shaped yarn helps to manage and eilminate heat and sweat build-up. Extended TORSION System - Midfoot shank which adds strength and integrity to the trainers. Continental Rubber Outsole - For superb grip, more durable and longer lasting mileage.