Rubber sole Foam cushioning, a soft insole and padding around the ankle put comfort where it counts—whether you're in or out of your training zone. Rubber tread gives you durable traction on a range of surfaces. Grooves underfoot let the sole flex as you step. Take on everyday challenges in the the Nike Defy All Day. Leather up top and rubber traction on the bottom create a durable design that lasts the rigors of tough training sessions. Soft cushioning carries comfort through your workout—or throughout a day of getting things done.