Bianca by Naot is a lightweight, slide-on sandal that is easy to wear with just about anything. It features two leather straps around the toes and in-step, and the strap around the in-step features twin elastics to help get a more custom fit. The insole is a thick cork footbed which provides a lot of cushion and support. Light, easy, and comfortable, what's not to like?
Available at Glebe Trotters.