Low Profile, High Performance. The MTN45 Low GTX packs serious performance into a low-profile package. New GORE-TEX Invisible Fit waterproofing adds increased comfort and flexibility, while energy-returning EnduroFoam Plus midsoles and TPE supercritical foam provide responsiveness and durability. This hiker keeps you in control across changing terrain while durable details and a Recraftable design keep you on the go, again and again.