Tents and rucksacks use synthetic fabrics, such as nylon or polyester, with a thin watertight polyurethane or elastomeric coating on the inside and a durable water repellent coating on the outside. This combination gives great strength and water resistance, combined with a light weight. These are ideal attributes for outdoor equipment. This wash cleans the entire fabric and protects it from the effects of both UV and water. Packaging may vary.