The Ell leash is built from the same heavy duty workings of the heavy duty leash, but has a lighter weight body so it is less intrusive when it is being used, it also comes with a rope leash about 3 foot long between the leash and the board, this helps to eliminate the problem of the fins or sharp rail of the board cutting through the webbing of the leash, the best the Oceanus make.
Watch the video about all 3 real leashes: