The TT Trainer 2.0 delivers ultimate comfort in a high-mileage neutral workhorse. The shoe utilizes Z-Bound: a super-light proprietary midsole that rebounds energy to reduce stress and fatigue and CarbonSpan+ which provides tunable control that maximizes effortless forward momentum without forefoot fatigue. Top it all off with a shock-absorbing, durable, and lightweight blown rubber outsole that is sure to last wear after wear.