I really like packing a maxi dress or two for just a summer holiday—they’re elegant and comfortable though also becoming light and straightforward to pack. I’d also bring alongside a light jacket or cardigan, as summer evenings in Austria (particularly if you’re from the water) generally is a bit chilly. https://tedomarket.com/product/shoes-2/mens-shoes/boots-mens-shoes/chelsea-boots/vintage-style-size-37-50-men-boots-genuine-leather-autumn-and-winter-shoes-water-proof-work-and-safety-shoes-men-quality-ankle-boots/