The Mountain Warehouse Grey Zip Off Walking Hiking Trousers Shorts in size 9-10 years are designed with durability and flexibility in mind. Made from polycotton material, these unisex trousers are perfect for outdoor activities like camping and hiking. The grey colour makes them versatile for both boys and girls, while the zip off feature allows for easy conversion from trousers to shorts. Perfect for adventurous kids who love to explore the outdoors.