Finally!  An ultra light / race binding with a brake.  This will make you ISMF legal and legal with USA Skimo rules.  This binding is reliable and light like the Ultra World Cup but has integrated brakes.  It is compatible with the R01 Adjustment Plate to allow you to have boots with different boot sole lengths.  It only weighs 135 grams.

This is the same binding as the ATK SL World Cup Brake.  The brake arms are activated by the heel cover.