Using these boots is easy. First, charge them via the USB port before your first use. Then, use the inner side metal zip to put them on and take them off. You can choose different light settings on the platform to match your style. For sizing, make sure to check the US sizing chart and convert from your Australian size if needed. When it comes to maintenance, wipe the vegan leather with a soft, dry cloth regularly to keep them clean. Avoid getting them wet as much as possible. Since this is a pre - order item, be patient as it takes about 12 days to arrive at our warehouse. If we face any issues like your size being out of stock, we'll reach out to you immediately.