twin boards. Tail and nose width – Many freestyle boards have equal nose/tail specs for equal performance either direction. Freeride and alpine boards, however, have a directional shape with a wider and longer nose. Boards designed for powder conditions exaggerate the differences even more for more flotation on the powder. Camber – The curvature of the base of the snowboard affects handling and carving. Typical modern snowboards have an upward curvature of a few degrees along the effective edges. Experimentation has led to boards with rocker, or upward curvature, which makes for a more buttery board and can improve float in deep powder. As time has progressed, modern boards now offer variations of camber-rocker boards that fulfill the different needs and preferences of its rider. Board construction The various components of a snowboard are: Core: The interior construction of the snowboard. It is typically made of laminated fiberglass around wood. Beech and Poplar are the most common woods, though other woods are used such as bamboo and birch. There have been continued experiments with aluminum, composite honeycomb, foam and resin to change, or substitute, the standard wood core. Desired properties of the core include damping, rebound, strength, flex and reduced weight. Base: The bottom of the board that is in contact with the snow surface. It is generally made of a porous, plastic (polyethylene) material, that is saturated with a wax to create a very quick and smooth, hydrophobic surface. P-Tex is a brand name that has become synonymous with base material. It is important that the base be "slippery", with respect to the snow surface and board interaction. Bases are made to have amorphous areas that are porous to wax. Wax is an important finishing product for all base materials. Not only does it allow the snowboard to have a smoother glide, but it also allows the rider to change the characteristics of the base and adjust the board to the snow conditions. Different base waxes are available for different temperatures. The base, when maintained, will have a designed base structure that not only channels snow, air and water, but leaves it open enough for wax to penetrate deep inside it. This pattern is created with a stonegrind machine at the factory or a local ski shop. If the base is damaged, it is common to have it repaired in order to protect the core from exposure as well