Weighs only 39g. It is the ultime re-design and re-engineering of the ordinary armband that has been commoditized. It is redesigned with User Experience and Ergonomics in mind. It is all-weather proof and can protect against splash in heavy rain while making sure all the openingings are shielded. Volunberable areas such as connector jacks are all safely shielded and protected. It also offers a mechanism for keeping the earphone wire organized thus no longer will you be running with a dangling wire. Last, but not least, it offers a storage compartment large enough for some change and key while making sure they don't rattle and make annoying noises while you exercise.