DURABLE MATERIALThe waterproof bag is made of thick upgraded wear-resistant PVC material which provides a stronger and more durably waterproof construction. Abrasion-resistant for long-lasting. A waterproof bag is well adapted to various weather conditions and environments.MULTI-APPLICATIONIts great waterproof performance, durability, and practical design make it a reliable companion for outside sports, which is suitable for different occasions such as boating, rafting, kayaking, hiking, camping, fishing, mountaineering, etc. KEY POINTSEach bag comes with a free whistle, bringing comprehensive protection for your safe travel. Outdoor Bags also come with an adjustable shoulder strap very convenient for your on-the-go. The lightweight dry bag will not weigh down your arms or shoulders.