The Concepts x adidas ZX 9000 Boston Marathon is a special release from 2020, paying homage to the iconic Boston Marathon. This sneaker is part of the exclusive A-ZX series, where the letter 'C' represents the Boston-based sneaker boutique, Concepts.

• Metallic silver upper inspired by marathon runner heat blankets
• Reflective laces
• Gold accent details
• Features adidas Torsion technology