The Men's Dayhike IV Trousers are built with Isotex 10,000 recycled fabric so they are highly waterproof. You'll be kept dry during drizzles and splashes along the way. The trousers are also breathable and allow moisture to escape, keeping you dry and comfortable. The stretch lining offers freedom of movement, allowing you to move without restrictions. Isotex 10,000 recycled fabric: Waterproof, breathable and windproof membrane technology - protects from wet weather and allows moisture vapour to escape through the fabric. Stretch lining provides freedom of movement. Multiple pockets allow you to stash your essentials safely.