The Montrail Women's FluidFeel ST Running Shoe lives up to its name whether you're sprinting over rugged trails or smooth roads. FluidPost technology offers lateral cush with medial support for a slower prontation rate on each foot strike. On trail, FluidPost gives more control on uneven terrain full of ruts, rocks, and roots. On roads, this technology offers cushioned support that neutral runners and natural pronators will appreciate. Montrail also equipped the FluidFeel ST with a lightweight full length FluidFoam' pure, responsive midsole. This flexible midsole works with the sole's flexible grooves for full mobility, and Gryptonite carbon rubber ensures long lasting grip over just about any surface in any condition.