Run hard, land soft. The GEL-Quantum 360™ Knit shoe is constructed with 360 degrees of our GEL® technology cushioning that blends high performance with maximum comfort. A new stretch knit upper surrounds the foot in a custom, sock-like fit so you can power through running and cross-training workouts. Weight: 10.4. Heel Height: 21. Forefoot Height: 11.