Balloon ordered

The balloon that will lift Zephyrus 1 is now on its way from the USA. The 300 gram balloon has a burst altitude of nearly 70,000 feet and can carry a payload of upto 660 grams when filled with Hydrogen. Since our balloon will be filled with Helium (as we'd quite like to live to launch a second balloon) we're capping our payload at around 500 grams.