Action/Reaction Technologyis utilized in the heel and forefoot. These external actuator lugs are designed to press into recessed chambers with an elastic membrane to absorb shock energy. During toe-off, the lugs are engineered to release the stored energy for increased forward propulsion.EVAis an industry standard midsole material designed to offer durable cushioning.Support Chassis is located at the midfoot/rearfoot and is a thermoplastic device meant to increase stability.Biomechanical metatarsal sensor plate in the forefoot allows you to feel the ground, offering constant sensory feedback. The Newton BoCo AT II is a standard, neutral, Road-Trail running shoe best suited for daily training.