Easier and more economical to use than high speed powders. In some conditions ZUMWax HS Block is even better choice than a powder. Meant for coating on top of High Speed waxes, but can also be used as a “boost” on top of powders. HS block is an excellent choice for any racer who wants an easy way to ski faster. The basic applying method is: Rub the HS block onto ski base, polish with natural cork, brush with a nylon brush & finish with horse hair brush. You can never make your skis slower with our HS Block but it gives best performance on old or wet snow.