New Balance Women's WTSKOMBW Trail Runner Polaris/Magnet The structured midfoot support, combines with a breathable mesh upper to provide security in a lightweight package. 8 mm drop: due to variances created during the development and manufacturing processes, all references to 8 mm drop are approximate. Synthetic/mesh upper. Vibram outsole provides maximum surface contact and multi-directional traction. Vibram is a registered trademark of Vibram S.p.A. All rights reserved. New Balance Women's WTSKOMBW Trail Runner Polaris/Magnet