The Topeak(R) Tri DryBag quickly mounts to the top tube of your bike for quick and easy access to energy bars or any small essential gear you need to keep close at hand. A padded and waterproof main compartment keeps contents dry, safe and secure. DESIGN: Capacity: 0.6 L / 36.6 ci Bag Attachment: Nylon straps fit head tube 44 - 75 mm and top tube 38 - 52 mm Compartments: One divided / padded main Material: 420 denier / 840 denier nylon waterproof fabric sonically welded seams Good for holding PDA mobile phone, energy bars, wallet and tools Size: 14.5 x 12.8 x 4.7 cm / 5.7" x 5" x 1.9" Weight: 65 g / 2.29 oz