The Asics GEL-DS Sky Speed 2 manages to retain enough cushioning and stability to make this a viable everyday shoe from a category usually reserved for race day and speed work. For runners, this is an interesting buy. For long distance triathletes, it's a secret weapon. Asics has it all right with the GEL-DS Sky Speed 2, providing enough cushioning and stability to do Ironman distance races, coupled with absolute lightweight comfort.