This model is an all-salmon version of the Mountain Pad.
A major upgrade from the Thinline, they have a double curved design that provides substantially more contact area. Full salmon coverage provides maximum braking power.
Note! Although Kool Stop's marketing folks think of this as a "mountain bike" item, these are actually the very best option for all brakes that use threaded studs.
They may be a problem for front brakes on some bikes that have excessively tight clearance between the fork blades and the rim.