Lightweight and waterproof saddlebag for mounting with velcro. High-frequency technology is used to ensure its waterproofing. Easy to carry tools, cameras, and other essential accessories. It mounts easily to the saddle rails and seat post with adhesive straps. Installation: Fastening with hook straps. Seatpost diameter: ø25.4 - ø34.9 mm. Matte black. Material: 420 denier nylon. Capacity: 0.35L. Size: S. Measurements (height/length/width): 85mmx140mmx40mm. Weight: 45g.