Newton Running Terra Momentum Nylon Shaft measures approximately Low-Top" from arch Action/ReactionTM Technology in the Midsole - Absorbs impact and adds responsiveness through the patented dynamic. Biomechanical Metatarsal Sensor Plate - Allows you to sense the ground better so you can stride more efficiently and with more stability. Highly Breathable - Ventilation can circulate the feet, whilst closed mesh prevents debris for entering. Non-stretch Upper and Webbing - Provides lateral stability Slip-proof Laces - With heel-securing double eyelets present a secure, customizable fit.