~Adidas Terrex says~ 

Versatile hiking and running pants made in part with recycled materials.

Trail running and speed hikes demand mobility. These lightweight hiking pants set you up for breathable comfort and maximum mobility on the trail. Pre-shaped and cut for a slim fit, their lightweight build has the stretch and breathability to let you focus on your effort. A mix of materials adds breathability where you need it most. A water-repellent finish sheds light moisture and spills. The dedicated phone pocket and secure side pockets keep trail essentials within easy reach.