The Topeak Smartphone Drybag 5 Inch has excellent waterproof material, that has been sonically fused and seam sealed to repel weather, mud and water for ultimate phone protection. A great way to keep your smartphone handy for communication or to use as a GPS during longer rides. This pack features a foam body for protection and a clear touch window for viewing phone display. The integrated QuickClick™ mounting system lets you mount or remove the drybag in seconds.