Fashion-forward footwear supplier and lifestyle brand Concepts has commemorated it 20th anniversary by partnering with Nike on some eye-catching, polychromatic kicks—the Concepts x Nike Free Trainer 1.0 that debuted on January 16. The cutting-edge cross-trainers are inspired by thermal-imaging technology prevalent in sports science, and feature patterning that reflects a heat profile. And the shoe’s tongue is actually made of a thermal-reactive material that reveals a colorful visual display when sufficiently …