adidas Energy Boost 3 Womens Running Sneakers/Shoes Synthetic Engineered Stretch Mesh Upper - Provides a natural feel whilst offering your feet great ventilation whilst your run. Techfit - Synthetic Rubberised Overlays, - work in conjunction with the shoes lacing system to provide for secure snug fit. Layered Tongue and Interior - Designed with sweat wicking properties that help guide sweat away from your feet whilst you perform. TORSION System -Provide for excellent stability in the midfoot. External FITFRAME 3D-moulded Counter - For a snug heel fit and comfort in motion with enhanced support and stability.