The Ferrox Pro GTX Mid has a lightweight and highly breathable fully synthetic upper, along with a highly breathable Gore-Tex membrane, ensuring your feet are kept in a comfortable climate in all conditions. The support frame offers excellent stability, while keeping the weight of the boots to a bare minimum, ensuring the Ferrox is agile and lightweight. The double injection mid-sole is made of proprietary DynaPU®, giving great cushioning and energy rebound – ideal for when covering terrain quickly.