Radii Ecto-1 Every sneaker in the Radii (ray-dee-eye) footwear collection sports a unique design. The Radii ECTO-1 is a stylish low-cut sneaker that features a large strap that goes across the midfoot and almost completely covers the laces. The strap contains a stitching pattern that is also mimicked on the heel tab, this really brings the sneaker together. The Radii ECTO-1 is currently available several exciting colorways.