1 1.2mm ultra-responsive TPU film works with touchscreen gloves (-20°F rated). 1680D ballistic nylon survives 15ft drops. Survived Moab trail 100-mile test ride Tool-free mounting system secures to any bike frame (12-45mm tubes) - velcro is used, which makes it easy to assemble and disassemble Submerge-safe 24hr waterproofing + 3-layer laminated rain guard. Tested in 55mph wind-driven rain simulations. Guaranteed dry in Seattle rains/ Florida storms 1.3L Capacity carry phones up to 6.5" (with Phone Cases) + 4 energy bars + multi-tool. 3D-structured compartment prevents gear shuffle. The reserved hole at the tail can be used for data cable or earphone