adidas Take on the outdoors with ease. The adidas TERREX Free Hiker 2 brings comfort and confidence to your everyday adventure. It's time to enjoy your outdoor experience. Find confidence in the great outdoors with the new adidas TERREX Free Hiker 2. Its Continental rubber grip provides reliable traction on your hikes. BOOST delivers incredible energy return and instant comfort with each step. The shoe's upper is made with a high performance yarn containing at least 50% Parley Ocean Plastic and 50% recycled polyester.