The Lake Sandal from Reformation is a flat, minimalist style featuring a single toe strap and an adjustable ankle strap for a clean, effortless look. The Lake Sandal from Reformation is a flat, minimalist style featuring a single toe strap and an adjustable ankle strap for a clean, effortless look. Founded in 2009, Reformation is a revolutionary lifestyle brand combining stylish, vintage-inspired designs with sustainable practices. With each limited-edition collection, the LA-based brand empowers individuals who want to look beautiful and live sustainably.