The Tech Mountain Trousers. The kids' trousers come with a water-repellent finish, perfect for exploring in changeable weather. The kids' hiking trousers are made with stretch fabric and come with articulated knees which will keep little ones on the go. Water repellent and durable with added stretch, our Tech Mountain Trousers will see little ones through their adventures. Featuring our Isoflex+ advanced stretch fabric, the kids' trousers are great for agility. They come with a water-repellent finish, perfect for exploring in changeable weather. The articulated knees on the kids' hiking trousers help little ones stay active, wherever their day takes them. ISOFLEX - Active stretch fabric - 91% polyester, 9% elastane. Durazone polyamide overlays at wear points for added strength and durability. Durable water repellent finish. Part elasticated waist. 6 zipped side pockets. Articulated knee design for an enhanced range of movement. Zip opening at ankle. Elasticated gripper tape hem. ISOFLEX+ advanced stretch fabric - Recycled 100% polyester