This is an interesting idea, its a pair of shoes that are also sandals. As you can see from the picture the top part of the shoe unzips to reveal a sandal inside the sole. They are made by Nat-2 design and cost £59.99. There are currently over 20 different designs available and you can also mix and match the soles with different top part. Currently the only place to buy them in the UK is Wild Goose in Twickenham. They seem like a great idea for the unpredictable UK weather.