The Terrex Free Hiker GTX delivers next-generation comfort and freedom of movement for hikes both long and short The Primeknit upper hugs your foot for flexible, all-terrain stability, while the Boost midsole delivers endless energy to keep you moving up or down the trail. The shoe features a Continental Rubber outsole for grip on any surface. A Gore-Tex membrane sheds water while letting your feet breathe for all-conditions wear.