The Flux RK30 is a freestyle binding that is made to be a flexible binding that works best in the park, but still handles well all over the mountain.
It uses their F-Tech Asym highback, which has varied thicknesses and a thinner/softer outside edge, meaning it will flex easily for pressing, but is still responsive due to the thick sections. On top of this, is EVA padding, made to soften the pressure on your calves and keep you riding longer.
To keep a true board feel, it has their Genetic baseplate, which has a thicker outside, and a thinner inside which balances the ride an keeps you getting the true feel of your board.
To handle tough landings from jumps and other park features, it has a dual-density EVA footbed, which will hopefully help save your feet.
Like most bindings, it has tool-less highback adjustment. These are going to be good bindings for riders who ride a lot of park, need a binding that is going to help them press and butter, but are not so soft that they are no good for all mountain riding.