The option to lock your heel while touring helps you better adapt to diversified terrain types where quick descents, side stepping, and skate-splitting become more effective means of backcountry travel.
Are you a lady that's riding men's Spark Bindings? Are they fitting a little sloppy around your heel? Upgrade your Blaze/Burners/Arcs/Surges with the Spark Women's Heel Loop Kit. This Kit comes with two Heel Loops and hardware for implementation.