The HS mark is applied to the Whip lengths 58" through 64". HS(high speed) is used to describe our Longbow limb that has been taken to maximum reflex/deflex without sacrificing stability, smoothness or quietness. Our other lengths/models(66" Whip and 54"-56" Pika) are designed to this perfect balance we call HS though they are not marked HS as they have not been changed from the original design.
Again All our new longbows are what we consider HS weather marked HS or not.
I hope this clarifies any confusion.
Dan and Jared Toelke