Spacious, easy to organize & designed to be worn on a bike, the Thunder is simple but it has everything to make you happy. Features Spacious main compartment & multiple pockets (for earphones, wallet, mobile phone, pens, glasses..) Removable waterproof bag that fits in a specific pocket to ensure it is completely waterproof Removable & adjustable chest strap. Adjustable waist strap Padded laptop compartment suitable for a 15" laptop screen Pass-straps to hang the bag easily to your bike, or to fix a helmet to the bag with a helmet net Dimensions: L30x H45x W17 capacity: around 23 liters