The bulk of a snowboard, the core is the interior of the snowboard. It is typically comprised of a solid material, normally either wood, foam, or some composite plastic. The properties of the core directly affect important characteristics of the board, such as flexibility and weight.
This is the bottom of the board which is made of a graphitic material that is saturated with a wax that creates a very quick smooth, hydrophobic surface. Because the base of the board comprises the bulk of the board's interaction with the snow, it is important that it be as slippery with respect to the snow as possible.
For this reason, different base waxes are available for different snow conditions. If the board is damaged, a new base pattern can be stone-ground into the board. If the base becomes significantly damaged, the board may become sluggish, or if the damage is deep enough, it may even weaken the core.
A strip of metal, tuned normally to just less than 90-degrees, that runs the length of either side of the board. This sharp edge is necessary to be able to produce enough friction to ride on ice, and the radius of the edge directly affects the radius of carving turns, and in turn the responsiveness of the board.
Kinking, rusting, or general dulling of the edge will significantly hinder the ability for the edge to grip the snow, so it is important that this feature is maintained.
However, many riders who spend a fair amount of their time jibbing park rails, and especially handrails, will actually use a detuning stone or another method to intentionally dull their edges, either entirely or only in certain areas. This helps to avoid "catching" on any tiny burrs or other obstructions that may exist or be formed on rails, boxes, and other types of jibs.
Catching on a rail can, more than likely, result in a potentially serious crash, particularly should it occur on a handrail or more advanced rail set-up. In addition, it's relatively common for freestyle riders to "detune" the edges around the board's contact points. This practice can help to reduce the chances of the rider catching an edge in a choppy or rutted-out jump landing or similar situation.
It is important to keep in mind that drastic edge detuning can be near-impossible to fully reverse and will significantly impede board control & the ability to hold an edge in harder-packed snow. One area where this can be quite detrimental is in a half-pipe, where well-sharpened edges are often crucially important for cutting through the hard, sometimes icy walls.
Two layers or more of fiberglass that add torsional snap and response as well as protect the wood core from damage. Often, it may be strengthened with carbon fiber or Kevlar stringers.