adidas Adizero XT Boost Women's Trail Running Shoes Lightweight textile and mesh upper - Provides full foot breathability. Abrasion resistant synthetic overlays - Reduces wear and tear while providing a supportive structure. High cuff compression collar - Helps support the ankle and keep out trail debris. Internal plastic heel counter - Cluches the achilles through transition for enhanced support. TPU fabrication leading to the eyelets - Wraps the foot for a secure closer.