New Other Brooks Women's Mach 11 Medium Cross Country Shoe 9.5 Silver Green White Navy White Measure around calf for circumference Black GRay Measure around calf for circumference Effortlessly connecting this together is TRU 3 Dynamic Socket Connection to allow for slight movement between the barrel and handle to maximize the trampoline effect and eliminate vibration 100% Mesh and synthetic Full Length Compresion Molded EVA give this spike a performance feel while maintaining cushion and flexibility Highly breathable mesh allows the foot to breathe 6 well Spike Configuration provides excellent traction on any surface