The New Balance Fresh Foam X Hierro v7 GTX women's running shoe employs a Vibram Megagrip outsole and a GORE-TEX waterproof lining to create a protective shell of durability and traction around the signature Fresh Foam X cushioning. Synthetic and mesh upper Adjustable lace closure for customized fit GORE-TEX waterproof fabric protects feet from wind, rain and water without sacrificing breathability Vibram outsole provides superior grip. Vibram is a registered trademark of VIBRAM S.p.A All rights reserved