The Li-Ning Feidian 5 Challenger "Island Blue" and "Pastel Blue", which are designed for high-performance running and racing. 

Technology and Performance

The Feidian 5 Challenger is a carbon-plated running shoe known for its versatility, functioning effectively as both a daily trainer and a race-day shoe for amateur to intermediate runners. 

· Midsole (BOOM Technology): The shoe uses a full-length BOOM midsole, an innovative, lightweight PEBA-based material that provides high energy return (around 89%) and excellent impact absorption.

· Propulsion (Carbon Plate): A full-length T700-grade, spoon-shaped carbon fiber plate is embedded in the midsole, designed to enhance forward propulsion, reduce foot pressure, and improve running efficiency.

· Outsole (GCR): It features GCR (Ground Control Rubber) for the outsole, a lightweight anti-skid rubber that offers superior grip on both wet and dry surfaces and is highly durable, rated for high mileage.

· Upper (BOOM FIBER): The upper is constructed with BOOM FIBER, a high-density, durable, and highly breathable engineered mesh (35% better airflow than traditional materials) that offers a secure, "shadow-like" fit.